there are two that i regularly report:
- not having different first picture
- have letters on the picture
Different first picture? There is no rule like that. All you need to do is making second set of pictures "story-less" that's all. Even devs showing sample flip did not mix first picture:

or here:

Yep, it is really funny for me, cos admins in telegram say that such flips are bad shuffled and those flips need to be reported
