I do not remember that much, but I believe some low level cards are available at more than one place and you do not need to collect all of them in numeric order as they work by level clearance access i.e. once you get a level 10 card, you cannot pick up any lower level one for example.
BTW, if you use a Phoenix emulator freeze save state, be careful with it and always close it by its proper exit option as it uses one file for saves in real time. So it can become corrupted.