So, no one has yet responded to you. Wondering if you got a second opinion or followed up on this. I tend to be trusting of doctors. They do take an oath for our care and see a wide scope of patients to be able to judge when to worry when not to worry. I actually think the two numbers you point out from 10 years ago as different don't look that far off. I think my pcp would refer to that type of change as slightly different but stable.
So, you are going to the bathroom more in the middle of the night is the issue, correct? Sometimes the answer is much simpler than we think. https://my.clevelandclinic.org/health/diseases/14510-nocturia For my own situation, I used to get up several times a night (I'm just a few years younger than you). I do not anymore. But two things happened. First, I did begin treating my blood pressure with Losartin. Not sure if that has anything to do with it but it coincided with my being able to sleep through the night. Second, I had a situation in which getting up at night was hard to do so would lay there not doing it. I don't know if it retrained my bladder or what. But that also happened around the same time.