2 Controllers Read as 1

[CM2016]

I recently downloaded dolphin emulator in the hopes of playing super smash brothers melee as my gamecube and its controllers were stolen recently. I read through all the guides and got SSBM to work. Unfortunately when I tried to set up another controller both were being read as one controller. For example when I tried to move the icons in character select both player one and player two's icon could be moved with both controllers. I was wondering if anybody could help me understand what I may be doing wrong. I am using one ps4 controller and one ps3 controller. Thanks