Fixed mistake in #115 and e5952b5

Tought I made a column stack, but it turns out that `hstack` and `vstack` didn't do what I want :/.

ompy/filehandling.py

@@ -284,25 +284,29 @@ def load_txt_2D(path: Union[str, Path]
 
 
 def load_numpy_1D(path: Union[str, Path]) -> Tuple[np.ndarray, np.ndarray]:
-    E, values = np.load(path)
+    vec = np.load(path)
+    E = vec[:, 0]
+    values = vec[:, 1]
     return values, E
 
 
 def save_numpy_1D(values: np.ndarray, E: np.ndarray,
                   path: Union[str, Path]) -> None:
-    mat = np.vstack((E, values))
+    mat = np.column_stack((E, values))
     np.save(path, mat)
 
 
 def load_txt_1D(path: Union[str, Path]) -> Tuple[np.ndarray, np.ndarray]:
-    E, values = np.loadtxt(path)
+    vec = np.loadtxt(path)
+    E = vec[:, 0]
+    values = vec[:, 1]
     return values, E
 
 
 def save_txt_1D(values: np.ndarray, E: np.ndarray,
                 path: Union[str, Path], header='E[keV] values') -> None:
     """ E default in keV """
-    mat = np.vstack((E, values))
+    mat = np.column_stack([E, values])
     np.savetxt(path, mat, header=header)