Can you wait 20 minutes or so without feeding, to see if he's coming up? On this forum, we suggest not shooting below 11.3 or so on the AlphaTrak, without someone to help you the first time. I'm about to head to bed so can't stay with you. Not sure if some of our southern hemisphere people are on. People here will shoot lower numbers, but only when they've got the data and experience to do so. You did shoot a lower number on the 10th. When they are coming down from a bounce, it could be a cycle you'll have to intervene with food.
If you are able to be around to monitor him, I think your options are to (1) skip (2) shoot a reduced dose, either .5U or .75U. If you can't be around, they I'd lean to a skip and resume dosing tonight. I'd also hesitate to give insulin if he's still coming down in 20 minutes.