Hi Wamor,
Forget about messing with those attributes. I think you are tapping post-fitting nodes unknowingly. I am guessing you are not trying to save compilation time or preserve timing by tapping post-fitting nodes. When you open nodefinder, make sure that you are selecting "Signaltap II pre-synthesis nodes". You'll find plenty of useful nodes on your controller to tap. Long while ago, nodefinder opened from SignalTap set the "Signaltap II post-fitting nodes" by default. It hides the best feature of SignalTap, IMHO. Moreover, in the most recent release, nodefinder hides that filter choice too. You have to expand it first using a button with rotated ">>".