If you go high at 2-3 hours after food it is your bonus that needs attention. Me personally, I would have given more bonus but lowered my basal by a unit. This would also depend on time(s) of taking the basal insulin too. Ie what type it is as tresiba, language all act differently.
The thing is though, you should not be down to the same level 4 hours after food. You should be down to your target level.
So my question is.... If you are say 7.0 bg before food are you giving yourself just a bonus for the food or a correction factor of bonus as well?