Thank you everyone for the replies, I think it's working better after resetting to default. I'm still getting mystifying triggers, but now when I zoom in I can see very short ringing spikes that is causing the trigger. I couldn't see those spikes prior to resetting to default. I suppose it could be user error (me) but I did look for those spikes previously and could not find any...
In any case, I'm much happier now, thanks to all again.
Frank
P.S.
1. I'm using a web browser and screen capture to make the jpg's. Probably the USB technique produces better quality JPGs, I'll
have to try it out.
2. I didn't use auto, I was using a single trigger, However, the suggestion to use normal is even more convenient because I don't have to rearm the trigger for each test.