Fix a typo and did some rearranging

Author: WeatherGod

pandas/core/indexes/api.py

@@ -101,10 +101,9 @@ def conv(i):
         return Index(
             lib.fast_unique_multiple_list([conv(i) for i in inds], sort=sort))
 
-    tolerance = indexes[0]._choose_tolerance(indexes[1:], tolerance)
     if kind == 'special':
         result = indexes[0]
-
+        tolerance = result._choose_tolerance(indexes[1:], tolerance=tolerance)
         if hasattr(result, 'union_many'):
             return result.union_many(indexes[1:], tolerance=tolerance)
         else:
@@ -113,6 +112,7 @@ def conv(i):
             return result
     elif kind == 'array':
         index = indexes[0]
+        tolerance = index._choose_tolerance(indexes[1:], tolerance=tolerance)
         for other in indexes[1:]:
             if not index.equals(other, tolerance=tolerance):
 

pandas/core/indexes/multi.py

@@ -1452,7 +1452,7 @@ def _sort_levels_monotonic(self):
         return MultiIndex(new_levels, new_labels,
                           names=self.names, sortorder=self.sortorder,
                           verify_integrity=False,
-                          tolerance=tolerance)
+                          tolerance=self.tolerance)
 
     def remove_unused_levels(self):
         """