Very weird problem with ps3 and arcade sticks?

Does someone ever meet such case :

my ps3 is going nuts with every arcade stick i connect (random inputs, characters jumping on their own etc.).

I already tried 3 mayflash sticks and hori FS3 stick. I even tried connecting mayflash through ps2 converter but result was same one.

This is weird becouse i tried this ps3 with dual shocks 1&2, logitech chillstream and cordless action controllers and all of them worked fine. Hell even some ultra crap cheap driving wheel worked perfectly.

What should i do ?

Do you think it’s worth trying with Cthulu pcb ? Or maybe axis adapter+hacked pcb is my only hope ?