I suppose it's possible to fall into a trap like that, but if one does it's just because they're playing mind games with themselves. The purpose of maintaining ANY list is for organization and execution, and failing to look at other relevant lists just because one list is getting done defeats the purpose of maintaining them to begin with.
One relvant idea I use from the FAST CD, (although it related to a slightly different example), is that I expect my system to enable me to look at the WHOLE GAME and make a good choice on my next action every time.
Control, Relaxation, Focus, & Inspiration -> The essence of the productivity experience