I'm living this annoyance at this very moment. I changed my site today. I tested a few minutes ago and I'm soaring above the atmosphere. Now I have the dilema I always have -- do I correct and wait it out assuming stress or some other fluke drove me high for a moment or do I just yank it out right away assuming I bent the canula? This situation is probably my only meaningful pump use complaint but it sure is an annoying one. I can't tell you the frustration I feel when I answer that internal debate with "just pull it out and start over, you know it's the canula" only to discover that the canula was perfectly the opposite (then I risk the same dilema with the next set). Or the opposite, I wait it out too long, and find a bent canula when I pull the thing and I kick myself for waiting. Granted -- in the scheme of things and all the woes that can happen with diabetes, this is a minor annoyance -- but an annoyance nonetheless. For the record, I opted not to yank right away. I will give it only 1 hour though. If I doesn't start trending down in a meaningful way, it's new site time. ARGH.