I get the impression you are having some difficulty in determining your AeT HR.
I would consider it a range, more than a specific number, which can change based on motivation, temps, hydration, distances, sleep, diet, etc.
What ‘AeT’ really is, is the max cardiovascular (CV) effort you ‘think you can’ maintain for a very long time, say 8hrs to 24hrs, without it ever stopping you from continuing. (As an aside, most folks can’t just run, for example, for 24hrs, but if below AeT, it isn’t their CV system stopping them). I say ‘think you can’ instead of ‘you can’ because we don’t really know that effort is, and actually trying it for hours and hours is fraught with confounders, etc.
As a runner I would just pick a value for AeT (based on LT1, AeT drift, VT1, percent AnT/maxHR, MAF, or an average of them) and just run at this HR and see how it feels. Does it feel like you could, from a heart and lungs perspective, do this all day? Then adjust this HR from run to run until you find what you feel is optimal (understanding it may be different on different days). Another quick confirmation would be to simply look at your HR after 20+ minutes of jogging at this pace, then cover your monitor up, continue to run at this same effort and pace for say an hour, then check you HR towards the end–if its 6-7 beats higher then you have failed the AeT drift test and should try a lower HR next time (once again, understanding, that this may change a bit daily). A rising HR is thought to indicate that your energy use per unit time is increasing, which may indicate that with even more time you would have to stop from a CV point of view–ie, you are above AeT.
If you’re specifically concerned about you AeT/AnT ratio, it seems like you are within 10%, based on your LT1 and 30min AnT test. But I bet your AnT is higher than 165-170–more like 175–for a fit, seasoned 46 year old. Even if it was, your AeT/AnT ratio wold still be around 10%. The AnT is subjective too, because you are running it at a pace “you think” you can run for an hour (or 30min), which may not be actually what you can run for that amount of time. Since both AeT and AnT are both somewhat subjective, and more like ranges than values, the AeT/AnT ratio should also be considered more an estimate than a hard number to achieve, per se (IMO).
I’m 47; have a MAF of 133, an AeT drift test of 148-153 (it can vary), VT1 (nose) AeT test of 158, and 75% maxHR AeT of 143. My max HR is 191, and AnT is 175. I mostly do long slow distance type stuff like alpinism and hiking, and based on perceived CV effort I believe my AeT is between 133-148 depending on the activity and environment. I’m happy with it anywhere in that range, and it gives me flexibility when on trails, going uphill, and being able to jog and not shuffle on flatter terrain. HR monitor helps me simply slow down on uphills and speed up on flats/downhills, but to be honest with you, over time (as I assume you are aware) you don’t even need that feedback. Since I train a lot between 133-148, this has basically become my AeT pace by default. It could be pushed higher, but I don’t see the need.