I had the same problem on my last oil change, but there was a little bit more then a few drops. It happened 3 days in a row. I know it wasn't any trapped oil and even if it was it wouldn't take 3 days and a puddle (about a shot glass amount) each time. The dipstick showed it being at the top of the full mark. It was clean engine oil - not trans oil or anything else.
I've been changing my own oil for over 45 years so I know how to do it, I've NEVER had a problem.
So I crawled under and looked around. The drain plug was tight and no oil anywhere around the plug. I then looked at the filter, it looked clean - no oil on it. I grabed it and gave it a turn and it turned about 3/8". That's all I did and do not have any more oil leakage. So I'm stumped. Maybe the filter was somehow able to loosen up a bit due to vibration, I don't know.