Both these diffs show diffs that disagree with the number of bytes added.
In this example 1 byte is apparently removed but the diff is green: https://en.m.wikipedia.org/wiki/Special:MobileDiff/537236750
In this example 11 bytes were added but diff is completely red:
https://en.m.wikipedia.org/wiki/Special:MobileDiff/536972232
Version: unspecified
Severity: normal