In the future, if your schedule won't allow you to change your shot times, you're going to be better off skipping. Then you can get back on the schedule you want to be on at the next shot time....Also, if you skip, that's the best time to make changes, so if you were (for example) wanting to go to 6am instead of 8am, if you had to skip the PM shot for some reason, in the morning, you could go ahead and start the new schedule without having to "work your way back" to it.
As it is now, since you did shoot 2.5 hours late, you're talking about shooting again at +9.5 and we really don't recommend that since an early shot acts like a dose increase. Since 1 unit has gotten him down into the 60's just a few days ago, it might be best to just skip the shot in the morning, and then get back on schedule tomorrow night
If he's really high, you might be OK to shoot a small dose, but I probably wouldn't shoot more than .5 and then see where he's at tomorrow night. Better too high for a day than too low for a moment!
Hopefully some others will have a chance to chime in before morning and give their opinions too.