Hello GeoffBeck13.
Thanks for your post and welcome to our community.
Sorry to hear about the issues you're facing with fast rewind and back arrow on our guide.
The rewind option should have 4 arrows with each arrow pressed resulting in a faster speed.
The channel guide should always go to to the previous show.
It might be best to power down your 360 box to see if that helps.
I’d like to investigate this for you anyway.
If you don't mind, I’ll need to send you a private message to pass security.
If you can check the Logo top right of your screen that would be great.
Regards
Gareth_L