I would do the AeT test again.
1. The test should start after the 15′ warm-up, and then continues for 60′.
2. It was too fast. The drift in the 45′-version was 9%, so AeT is much lower. If that one started at ~150, next time gradually warm-up to 130, let HR stabilize before you start, and then hold steady for 60 minutes.
Here’s a video of a drift test: https://uphillathlete.com/heart-rate-drift-test/
For the AnT test, why would you set it at 170+? The average was 167. The last 20′ was 165. I’d use 165 until you can do another test without the HR glitches.
And at 165, it’s reasonable to think that AeT may be in the 130 range if you’re new to structured endurance training. Start with an AeT test at 130, then do another AnT test in a month or so.