Strange Blood sugar after food.

Bet the 11:30pm reading was dodgy for some reason, bad strip, dirty finger, not enough blood. Any one meter reading can be +/- 0.5ish out and sometimes worse just because of the meter. Looks like you've been a bit worried so the 3 hour one maybe high through stress.

So no simply you're are not broken in my opinion! Wish I was 4.0 just before I eat! Also remember the advanced rules of low carbing. They'll be some GI / GL stuff going on and also non carby stuff can also produce an insulin response (read about insulin index). I would guess the meal amounted to around 20g of carbs? If that was the case then I'd be very happy with the response and levels you got and would just assume the 3 hour one was stupid and ignore it. I would have been right cos your 4 hour one is back at 4.5 which is coincidentally the same as my 4 hour reading tonight so SNAP!

I thought protein took about 4 hours to convert into glucose? Or have I got that wrong?

simplyh, your figures look fine to me too. As xyzzy says, meter error can account for a lot of variation. They can be up to 15% out, which could make the 5.8 into 4.9, and the 4 into 4.6!
Remember also that our BGs aren't a straight mathematical result based on the number of carbs we eat, just closely related. The whole time, our pancreas is a bit like a thermostat. BG a bit on the rise, squirt in some insulin. Lowering, stop the insulin. Getting too low, sdquirt some glucagon to make the liver release glycogen and bring BG up. Bit high? More insulin please Pancreas. So it goes up and down all the time. We also have different responses at different times of the day. During the morning, my BG steadily reduces into the 4's. Afternoon, regardless of what I eat, or even if I eat zero carbs, it gradually rises to high 5's. Others respond the other way round and have bad mornings but good afternoons. I think I have a higher "steady state" in the afternoon than in the morning; whatever I eat takes my BG up, and then it gets back to that steady state eventually.
On your very low carbs, you hardly went up at all as a resdult of food, but maybe your BG was going slowly up to it's "steady state" for that time of day. Just a thought.

I have the same reactions to many of my evening meals, especially if they have protein and very little carbs.
I know protein takes longer to break down to glucose so that is probably the cause but it is very tricky as you think a meal is fine but really it is raising you probably too high at a later point. The 2 hour testing is pretty useless in these cases!!

Regards
Angie