Why does memrise app jump between different reviews?

I have Memrise pro on my Android phone and I want to know why it jumps between the different review techniques?

For example, I might enter Memrise French 2 and the app will tell me Classic Review is next. However, if leave the screen in anway (including clicking on the colored dot menu, but not selecting a different review style), Memrise will tell me something else is next.

This puzzles me because it doesn’t seem particularly systematic, at least not compared to the website where I know how many words I have to review for the day before moving onto learning new words.

Also, when the courses are downloaded for offline use, is the meet the natives function supposed to work? Because it doesn’t on my phone.

you can see how many words are due to review if you tap on those 4 colors