My dad has the 670 and I'm designated to programming it. when in activity mode there is room for 4 buttons per page (the top 2 aren't used because it says "Watch __". But when I use the software it assumes there are 6 buttons per page for you to map buttons to. I can figure it out but is this some bug?

Not exactly an answer to your question, but under "Remote preferences" there is an option to turn off the "Watch xxx" heading and use all 6 buttons while in an activity.

thanks czzer... that actually does answer my question :)