User blog comment:BertH/Technical Update: March 9, 2016/@comment-1251315-20160310165827

I have noticed that edit counts seem to be very inconsistent all across Wikia. Here's a good example, using the wiki I recently adopted: w:c:citybuildinggames. A lot of content there has been imported, but it's a good way to showcase the inaccurate numbers). These numbers are taken at the time of this post: This is inconsistent: the masthead in particular should be matching the number of edits listed on Special:Editcount and Special:UserActivity should also be matching.
 * 1) The edit counter displayed on Special:Editcount for my account displays the accurate number of edits I've made there (which includes imported edits): 3605 edits
 * 2) The edit count shown in the masthead seems to be ignoring all imported edits and says I've only made 705 edits
 * 3) When I look at Special:UserActivity here on Central for that wiki, it says I have 1529 edits.

I suspect this has been around for a long time, but I'm only noticing it now due to the many sources of "edit counts". I should point out that I don't really care about edit counts in general, but I do care about accurate statistical reporting.