Just finish spraying a exterior of a house with Duration flat, and the whole house flashed out on me. Never had that happen before. I have sprayed 5 or 6 house this year using Duration satin and never had a problem. This should have been the easiest job I had all year just a re paint, siding really didn't even need painting. It look worse now then before I started. I was wondering if anyone else has had this problem this year or just an isolated issue?