Having been with a controlling psychopath in my past, this behaviour lateness, if he was worried about you, OK that's normal.
But the texting while you were in work is something.
It's slightly controlling, I mean you were home safe. You were fine.
So why can't he forget about it?
Most normal guys would.
Because it's about control.
Control? no. lying, yes.
It would have rubbed on his mind because he was cleared concerned about her being there at 11pm and time ticked by.
This would aggravate any other concerns that exist about fidelity or family priorities such as importance of good showing at work if they are on a budget or saving for something together or if there are issues at work.
With the work text clearly he had good reason for argument at night (that it wasn't 11:10 when she got in) but dropped it because it wasn't the time for that kind of argument, since she was already late at home and had work the next day.
So next day is the time to bring up the incorrect data that she used as her proof. Doesn't surprise me that with her self-absorbtion that she has already shaved a few minutes of all the numbers and going from the time she got in the gate not unloaded after coming in the door ("at home") and is already busy believing her lie.
Although I am biased in this because I had a lengthy relationship with a woman who used to constantly do such things. It would be "couldn't get away". who was there? "no-one important". what were you doing? "nothing". why couldnt you get away? "I just couldnt, it would have been rude". You said 10:30pm, "Yes but it's only 11:30pm, I still have time to do the wrapping".
So "nothing" with "no-one important" was so critical that she'd blow off me, the person waiting at home, so we could wrap the presents (which I wasn't allowed to do because she liked doing that bit), hoping for a bit of "us" time. It wasnt until much later that I have realised how much I just didn't rank in her priorities and just how much I'd been outright _used_.
So if she gave a damn about her partner, she'd have been home, in the door, noticeably before 11pm. (but she was not, and closer to 11:30pm he knows it too)