What gameplay feature is this bug affecting?
Achievements

What's the issue? Please include any error messages you receive and as much detail as possible.
The Achievements Overview tells me I have:

148 / 172 achievements
29 / 38 Challenger achievements


In reality I have:

152 achievements
25 Challenger achievements


The total number is right, but not how they are assigned. 4 "normal" achievements are counted as Challengers instead.
I do not know which ones (as there is no way to tell) and this might affect more than 4 achievements, since I do not have all the achievements (yet).

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
https://www.lioden.com/achievements.php?id=44616

Any screenshots you can provide us with?


Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
- Get a whole bunch of achievements
- Compare the numbers listed in the overview with the actual numbers
- Notice the difference