I'm about to fall asleep, so I'll just try to give a few options in case you haven't yet.
1) it would probably be okay if you skip. I know you're trying to get back on schedule, and stalling doesn't exactly help with that. He may be high in the morning, but as you saw today, he seems to handle that pretty well.
2) you could give 1.25u, but I'm afraid you'll end up with a long night unless he has risen a fair amount while you've been stalling. 1.5u was okay during the day, but it still left you with a low PMPS, so it ws a little too much at this point.
3) you could give a much smaller dose like 50% of normal, and go down to 0.75u. Again, could be a bit high in the morning, but I don't think you need to worry too much about that at this point.
Honestly if it was me and he hasn't risen, I might just skip and go to sleep.