A test that was accepted and subsequent photos that were not for technical issues
Recently I sent in 6 photos as a test because I had increased my ISO to 800-1250 in order to capture photos of an active bird family in our birdhouse, in the shade. Also, I was using a zoom lens and needed a high shutter speed for handheld. I didn't expect over half of them, and maybe none, to be accepted due to what I thought was graininess. All 6 were accepted.
I then followed with 13 more that were in those settings and all were rejected for technical issues. I've never had an entire group rejected. If half of each group was accepted, or all rejected, I wouldn't have a question but I'm confused. Is it possible different reviewers are looking for different things? Do I try sending them again?