Q: Incorrect "Stand" notifications

Got my Watch for Christmas, paired with my 5 and it worked great - Stand notifications would come in at 10 til the hour (if I had been sedentary).

Just upgraded to a 6s and due to an issue with my phone, had zero backups to iCloud, so no Watch backups, either (yes, I was sad) so had to wipe both Watch and phone and start from scratch.

Ever since, I will get notifications for "Stand" while I'm sitting at the 10 til mark saying keep it up, then, even if I don't get up, will be told I reached my minute of standing -- even if I don't move. Today is a great example -- I'm using MLK to catch up on some homework and have been a slug. It's happened twice while I've sat here on the computer typing so I know I've not moved in order to make it work.

Ideas?