When in grid live mode, a double click on a page button takes you into the page, but at the same time it changes its activity state.
You will not notice this if the page is in an active cluster, but if it is in an non active cluster or just by itself, this will happen if you doubleclick it: You go to page level, but the page will only play for one measure because it was also deactivated when you doubleclicked it.
I dont see any reason for this behavior, and it could be a real pain for live performance. (And it took me a while to find out why the friggin page kept stopping:S )
So my proposal for grid live mode:
If you doubleclick a page button you go to page level and the activation state for the page is untouched.