You can potty train a couple different ways. So, if what you are doing isn't working for your son, I would definitely try something else. Maybe back off for a couple weeks and then re-introduce. That will lesson his confusion.
I can tell you what I did.... which was to back off and let my daughter lead the way. But, once we went undies..... we were DONE with diapers. My daughter was pretty verbal, though. We were able to have conversations about what it was all about. I told her to tell me when she wanted to change into undie-pants, which she had seen at Day Care on another girl.
When she was ready, she said "no more diapers" and we changed to undies. She had 2 or 3 accidents, but that was really it.
Because I let HER own the process. I dangled a carrot (the princess undie-pants), I was consistent with consequences.... if you have an accident, you help clean up and then we move on and try next time.
I am against reward systems or punishments for potty training. You will have parents suggest BOTH. Did you reward for walking? Talking? Sitting up? Eating? Did you punish when he stumbled? Said a word wrong? NO, of course not. Those are PHYSICAL milestones. They are just something they are expected to do and they WILL do eventually (unless there is an actual issue). If you reward or punish you are giving them a choice. This is the FIRST opportunity they have to really really exercise CONTROL.... and if you attach power and emotion to potty training they will use it.
So, I would back off the actual pottying and wait until HE decides he's ready. Then go full -force. No more diapers during the day.
Good Luck