I don't know if this is a bug or I just looked at it wrong, but I think it would be important anyway. In the PSX ISO area, there are no P games (games that start with the letter P). The list just jumps from O to R (the lack of Q is understandable.) I'm pretty sure that there were P games, but like I said, I could be wrong.
I think that there is a bug in the nds area for downloads. when i went to page 7 of the action nds games it sent me directly to the shooter genre page 1 for nds games.
You must have accidentally changed genre then, there's nothing in the code that is even remotely capable of doing that without user input.