Issues with multiple controllers

Is there a limit on how many inputs devices can be plugged in at once when using retroarch? Having some issues with setting up controllers in retroarch. It appears that I may have too many plugged into my computer. Like there is a limit of 6?

I currently have a Mayflash gamecube adapter , mayflash dolphin bar, and a USB snes controller. The device index shows Mayflash gamecube port #1, #2, #3, #4, Mayflash Wiimote Dolphin bar #1, and #2. Shows no USB snes controller. If I unplug the Mayflash gamecube adapter, it will show Mayflash Wiimote Dolphin bar #1, #2, and the USB snes controller.

Anyway else experience this issue/know a fix?

Thanks! I will check this out when I get home.

This fixed my problem. Thank you so much for the info!