38 minutes ago, brooksms said:Maybe that is lowering the oven temp more than when I just bake one?
OK. I’m reaching now but I know I had this issue and it’s only fair to share and see if it has any relation to what is happening to you. I discovered that just because my oven said that it had reached the temperature set (that is the preheat cycle was complete) my oven was nowhere near the temperature that it should have been at. I’m only throwing it out as a thought. If you don’t already have an oven thermometer in there it would be a worthwhile exercise.