It does seem that Marriott's lifetime balance failed to count one of my nights. - That night was manually credited to my 2018 elite nights total. I'm not going to hassle over this. - It's just incredible that the many times Marriott systems bug out, they end up screwing us rather than helping us. Statistically, it should be closer to 50/50.
Marriott's website used to show the number of years I was Plat. This info is no longer there.
Also, I see an infinite logo next to my generic avatar, and there is a gold ring around my avatar. Is there any other way I can verify that I do indeed have LT gold?