bugs with my street fighter 2 ce pcb

Hi !

I've just received my ebay's street fighter 2 ce pcb. Everything seems
ok, but there's 2 "bugs":
- after the fight is finished, the background disappears and the sprites of the
characters stays on screen with a uniform coloured background. It last for 1 sec,
before the next round begins.
When comparing with the emulation, it happens when the screen should fade out...
Not very annoying but strange looking...
- the button 2 of the jamma interface is seen by the game as the 4th button (the
1 st button of the kick harness). So when connecting to a 6 button controller, the
2 and 4 button do the same thing. In street fighter language: there's no middle
punch and 2 light kick !!
In test mode, i see the same thing. Button 2 is never 1, and button 4 is
1 when pressing button 2 or 4. The only time i can have button 2 is when
pressing simultaneously 2 buttons (i don't remember which ones...)
It's the same thing for player 1 and player 2.

Anyone have a clue about this ? A problem with the pcb ?