Two things come to mind:
1) I wouldn’t worry about your AnT right now. With a ~20% spread between AeT and AnT, all pf your aerobic work should be below AeT. You need to close the gap between the two thresholds in order to benefit from high-intensity work in the future. So I wouldn’t worry about what the actual zone markers are right now.
2) Z1, Z2, etc are zones, not thresholds. So each will have a lower boundary and an upper boundary. One heart rate may define a zone boundary, but it can never define the entire zone. For now, use ~140 as your AeT (upper boundary of Z2) and ~125 as the upper boundary of Z1 (10% below AeT).
The higher threshold and zones aren’t much use to you right now, so I wouldn’t worry about them. When they are useful, their boundaries will likely have changed anyway.