Originally Posted by cojiro
Yes, I have. That's how I configured the buttons to begin with, but there aren't any options. I forgot to mention, in Windows Explorer, they work properly. It's only in the web browsers (IE8 and Chrome) that they behave this way. I can't find any related setting.
Quite possibly you didn't need to configure those two buttons for back and forward.
They may have already been mapped for it with the web browsers, so when you configured them for back and forward using secondary software, you binded it twice.
Causing it to do 2 backs and 2 forwards in web browsers.
Try taking off the setting you configured for those buttons to be back and forward with that secondary software you used.
Then try to use the buttons in a browser and see if it only does 1 page.
That's just my idea/guess.