Here is an incident raised about the issue when using page history comparison tool in wiki.

Here are the steps to replicate the issue:
1. Open url: https://wiki.auckland.ac.nz/display/UoACRM/RN+System+and+Network+Performance+issues
2. Tools -> Page History
3. V.57 and V.58 checked -> Compare Selected Versions

Please refer the attached screenshot that the comparison result is one column shifted. The Date and Time field has split into two columns as comparing result.