I use pcsx2 0.9.7 and pad plugin SSSPSX PAD Plugin Pressure Mod 1.7.0 [PADSSSPSX].For Pad1 i use an Logitech RumblePad 2 USB and for Pad2 i use keyboard.
Here is my question why Logitech controller control in the same time Right and Left on player1 and player2.
Try with Lilypad plugin, I don't quite understand the problem however... maybe a couple screenshots of your controller settings or a better explanation would help.