I agree with Wendy, it's possible he may have gone lower on the pm cycle of the 23rd, no way of knowing without a before bed test, so waiting to see what he does when the bounce clears makes sense.
With that drop into blue (170pt drop from amps @+6) it's entirely possible he is clearing now, or gearing up to clear it this evening. If you are able to get another test in before pmps this afternoon it might offer some insight on to what he is doing, when they clear a bounce they can nadir much earlier or later than usual.
I know that you are unable to test through the night due to health issues, not sure how your shooting schedule fits in with your meds, but if you can it would be really helpful for you going forward to always get a test in before you head of to bed, even if it's a +1, it can be very informative, and can help fill in the gaps.