diff --git a/tests/fixtures/ead/ead_record_all_fields.xml b/tests/fixtures/ead/ead_record_all_fields.xml
index 7bbed6a..ef44bf5 100644
--- a/tests/fixtures/ead/ead_record_all_fields.xml
+++ b/tests/fixtures/ead/ead_record_all_fields.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata>
diff --git a/tests/fixtures/ead/ead_record_attribute_and_subfield_variations.xml b/tests/fixtures/ead/ead_record_attribute_and_subfield_variations.xml
index d3f959b..6da95a9 100644
--- a/tests/fixtures/ead/ead_record_attribute_and_subfield_variations.xml
+++ b/tests/fixtures/ead/ead_record_attribute_and_subfield_variations.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/6</identifier>
+            <identifier>oai:mit/repositories/2/resources/6</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata>
diff --git a/tests/fixtures/ead/ead_record_blank_optional_fields.xml b/tests/fixtures/ead/ead_record_blank_optional_fields.xml
index 3512e28..b98fb4b 100644
--- a/tests/fixtures/ead/ead_record_blank_optional_fields.xml
+++ b/tests/fixtures/ead/ead_record_blank_optional_fields.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/2</identifier>
+            <identifier>oai:mit/repositories/2/resources/2</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata>
diff --git a/tests/fixtures/ead/ead_record_missing_archdesc.xml b/tests/fixtures/ead/ead_record_missing_archdesc.xml
index b69bf65..71045a5 100644
--- a/tests/fixtures/ead/ead_record_missing_archdesc.xml
+++ b/tests/fixtures/ead/ead_record_missing_archdesc.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/4</identifier>
+            <identifier>oai:mit/repositories/2/resources/4</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata></metadata>
diff --git a/tests/fixtures/ead/ead_record_missing_archdesc_did.xml b/tests/fixtures/ead/ead_record_missing_archdesc_did.xml
index 74cd87d..e9c67d8 100644
--- a/tests/fixtures/ead/ead_record_missing_archdesc_did.xml
+++ b/tests/fixtures/ead/ead_record_missing_archdesc_did.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/3</identifier>
+            <identifier>oai:mit/repositories/2/resources/3</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata>
diff --git a/tests/fixtures/ead/ead_record_missing_optional_fields.xml b/tests/fixtures/ead/ead_record_missing_optional_fields.xml
index e59afc5..dd897e6 100644
--- a/tests/fixtures/ead/ead_record_missing_optional_fields.xml
+++ b/tests/fixtures/ead/ead_record_missing_optional_fields.xml
@@ -2,7 +2,7 @@
 <records>
     <record xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
         <header>
-            <identifier>oai:mit//repositories/2/resources/5</identifier>
+            <identifier>oai:mit/repositories/2/resources/5</identifier>
             <datestamp>2021-11-06T14:35:55Z</datestamp>
         </header>
         <metadata>
diff --git a/tests/sources/xml/test_ead.py b/tests/sources/xml/test_ead.py
index 9d67036..5141183 100644
--- a/tests/sources/xml/test_ead.py
+++ b/tests/sources/xml/test_ead.py
@@ -880,7 +880,7 @@ def test_get_dates_success():
     source_record = create_ead_source_record_stub(
         header_insert=(
             """
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             """
         ),
         metadata_insert=(
@@ -907,7 +907,7 @@ def test_get_dates_transforms_correctly_if_fields_blank():
     source_record = create_ead_source_record_stub(
         header_insert=(
             """
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             """
         ),
         metadata_insert=(
@@ -924,7 +924,7 @@ def test_get_dates_transforms_correctly_if_fields_missing():
     source_record = create_ead_source_record_stub(
         header_insert=(
             """
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             """
         ),
         parent_element="did",
@@ -936,7 +936,7 @@ def test_get_dates_transforms_correctly_if_date_invalid():
     source_record = create_ead_source_record_stub(
         header_insert=(
             """
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             """
         ),
         metadata_insert=(
@@ -955,7 +955,7 @@ def test_get_dates_transforms_correctly_if_normal_attribute_missing():
     source_record = create_ead_source_record_stub(
         header_insert=(
             """
-            <identifier>oai:mit//repositories/2/resources/1</identifier>
+            <identifier>oai:mit/repositories/2/resources/1</identifier>
             """
         ),
         metadata_insert=(
diff --git a/transmogrifier/sources/transformer.py b/transmogrifier/sources/transformer.py
index 356ffe9..2583f48 100644
--- a/transmogrifier/sources/transformer.py
+++ b/transmogrifier/sources/transformer.py
@@ -107,10 +107,10 @@ def __next__(self) -> DatasetRecord:
                 self.skipped_record_count += 1
                 action = "skip"
 
-            except Exception as exception:  # noqa: BLE001
+            except Exception as exception:
                 self.error_record_count += 1
                 message = f"Unhandled exception during record transformation: {exception}"
-                logger.warning(message)
+                logger.exception(message)
                 action = "error"
 
             return DatasetRecord(
diff --git a/transmogrifier/sources/xml/ead.py b/transmogrifier/sources/xml/ead.py
index 971588a..d435a85 100644
--- a/transmogrifier/sources/xml/ead.py
+++ b/transmogrifier/sources/xml/ead.py
@@ -1,4 +1,5 @@
 import logging
+import re
 from collections.abc import Generator
 
 from bs4 import NavigableString, Tag  # type: ignore[import-untyped]
@@ -549,7 +550,14 @@ def get_source_record_id(cls, source_record: Tag) -> str:
         Args:
             source_record: A BeautifulSoup Tag representing a single EAD XML record.
         """
-        return source_record.header.identifier.string.split("//")[1]
+        matches = re.match(r"oai:mit/+(.*)", source_record.header.identifier.string)
+        if not matches:
+            message = (
+                "Could not parse TIMDEX identifier from OAI identifier: "
+                f"'{source_record.header.identifier.string}'"
+            )
+            raise ValueError(message)
+        return matches.groups()[0]
 
     @classmethod
     def parse_mixed_value(