By "only one counted" I meant as in getting that collectible and heading to the exit in the same life. I got the other 3 in attempts that I died. I worded it like that since it didn't increment the collectable counter until I exited with one of them. As I said it was a bit difficult for me, so it felt too annoying to redo several challenges while I still didn't know where the exit was. When I did get to the exit I decided to redo one of the challenges then exit so I could say I actually collected one of the objectives.
Also, interesting to hear you change some of the mid air control. May check that out, if I get an itch for this game again.