I get those popups all the time, but not with a date. I read on my Fire and just to see, I opened it on my Nexus. Same book on and sure enough, it tells me I am currently on 73, however, it looks like you read to page 71 on your android today at 12:00 am. Pretty sure I was out cold already by 12 am this morning
I am actually on page 75 on my Fire. So its close with the syncing. This is kind of what kindle does too though. They ask you if you want to jump in case you want to stay where you are on the device you are. Maybe if someone else reads the same book.
Haven't seen a year yet though, that is a bit amusing. I know you haven't been able to read for a while because of stuff going on in your life, but I didn't think it was that long.