Hard to tell. It is possible that she was still dropping this morning and insulin on top of that gave you a higher flatter curve. A midcycle number at night might help figure out this puzzle - maybe she drops at night and then bounces up? If she were mine, I would give the 4.5 dose a few cycles and see what it does. I think she might be overdosed, but there isn't enough data to know whether that is the case or if it is not enough insulin.
I am not sure about tonight. If she were rising, I would say definitely shoot. I am wondering if she is still headed down and will have a long cycle (over 12 hours) If that is the case (and it could have been this morning) it is posssibly a sign of too much insulin. Can you put off the shot 30 minutes and retest, without feeding? If she is headed down, that tells us the dose may be too high. If she is headed up, then I'd give her the 4.5 and get a before bed test to see where she is headed.