Fix bug with rechecking not removing txs w/ old sequence number

[ValarDragon]

See : osmosis-labs/cosmos-sdk#58

---

For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

[codecov-commenter]

Codecov Report

Merging #772 (538b88a) into main (f4bd219) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #772   +/-   ##
=======================================
  Coverage   19.96%   19.96%           
=======================================
  Files         189      189           
  Lines       24542    24542           
=======================================
  Hits         4899     4899           
  Misses      18788    18788           
  Partials      855      855           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f4bd219...538b88a. Read the comment docs.