Ok there are several reasons this could happen
1st) there could be something wrong with 1 or both of the stages files.
2nd) you could be overloading with codes. which causes the game to freeze mor often.
3rd) your storage device for hacks (weather its an sd or flash drive) is nearly filled space.
it appears too read it slower if its filled
4th) your not giving it enough time to load (give it about 5 seconds after you choose your character and 5 seconds b4 you choose your stage) however you only need to do that if you are indeed overloaded, and it works about 75% of the time
5th) custom slots take even more space and most the time dont work with expansion so that alone could be freezing you.
1) One stage has been used numerous times by other users, so I don't think that's it. The other, however, may.
2) I'll look into that.
3) I looked and I have 589 MB left on my SD.
4) I'll try that out.
5) I already have 8 STAGES in custom slots, and they work fine.
Thanks for the tips. I'll try them out!