Mouse not working correctly on Mac login screen

For some reason when my mac is at the login screen, moving my external USB mouse will cause the cursor to only move up and down. Once I am logged in, the mouse functions normally. Does anyone know the reason/fix?

Steps I have taken:

• Reset SMC/NVRAM
• Reinstalled OS
• Tried another USB Port

Late 2013 15" MacBook Pro running Yosemite 10.10.3

with iHome wireless USB mouse.

I tested it and mouse works fine without problems on my Windows PC.

I'm assuming this is a USB mouse with a cord? I have seen issues with those not recognizing properly until login when connected through the USB ports on a keyboard, or on laptops. I've always accounted it to the mouse needing more voltage than the USB port is delivering until the user is logged in. This seems to be the case with older mice more often than newer ones.