So I checked
@Kartik RE Mercs3D lists title ID 0004000000174100, the wrong one i mentioned before, the one that corresponds to the US version of megaman legacy collection, so I checked that game and it gave me 00040000000EC300, which is the title ID for ANOTHER game i have installed, the US version of link between worlds, checked THAT game which gives me 00040000000B9E00, the ID for nano assault EX US, another game i have installed.
THAT one gives me 0004000000054000 which is the US version of super mario 3D land, another game I have installed.
I can keep going and check all of them but the pattern is clear, the app is mixing up the IDs for various titles i have installed.