I just drove this again and osmand still wanted me to go right and take a u-turn. I wonder if it thinks it's so clever to dodge the "2" stoplights there? 

U-turns aren't technically disallowed there, so I dont think disallowing u-turns at that junction is the best way to fix it...

I want to say I've seen elsewhere there was a way to denote a single stoplight on a divided highway; I'll look into that.

I'll also look into adding correct speed limits and such to encourage osmand to do the right thing.