Two different brands of white trim and door paint aren't necessarily the SAME SHADE OF WHITE!
I thought I would do a little paint touch-up on the bedroom doors and now have to paint the entire fronts of them. Fortunately, I am ahead of schedule. It is 8:20 and all the paper is off, the cupboards and trim are painted. I'm going to put on a coat of wall paint and while that is drying, paint the doors.