Please don't become frustrated. Everyone finds their own rhythm when it comes to testing. I'm very fond of data and having data allowed me to become comfortable with a cat who seemed like "drama queen" was her middle name. (Although looking at Zeke's AMPS, he may like drama, as well!) And yes, you are testing a good amount. At least recently, it does look like Zeke has an earlier nadir during the PM cycle than the AM cycle although, he can also get very good duration and run you ragged at night. (You are wise to have tested early some evenings due to dropping numbers at PMPS.)
I tend to like getting a +2 or +3 because it may give you a hint as to where numbers are heading. You could try getting a test at +6 or a little later in the AM cycle. While right now, it looks like Zeke wants you to stay up at night and keep company, that can also change. You're doing exactly what you need to do when Zeke's numbers drop. If it helps at all, at one point I happened to mention to another member that, "Sleep was vastly overrated." I didn't sleep all that much at the beginning of Gabby's sugar dance.