Yeah, that's just a little graphical noise added by the game. I could change 119 into a land province, but that just gives an amazing chokepoint for a player. I'd have to make two or preferably even 3 land provinces, but to be honest I don't think that's necessary. Interestingly enough, that sandbar DOES prevent those two water provinces from having a connection, which is kind of neat.
EDIT: Actually, it's really obvious that I should just connect the land provinces on the ends of the sandbar. There will still be a chokepoint of sorts, but it'll probably be a major point of contention and will solve a lot of problems with vertical movement on this map. Also, it's practically a given that one of those provinces will be under the control of R'lyeh because it's the easiest way to hop to the other side.
Under the assumption that it's probably going to be Map 3, I've gone ahead and started doing the edits. There's a cluster of 4 farms; 2 of them will be turned into Plains instead. All Large and Small province tags have been removed. The remaining Impassible connections have been changed to Mountain Pass or removed entirely; Normal connections and Mountain Pass connections were changed to reflect what the map actually looks like. The ugly long connections when provinces barely touch have been removed. And any provinces with 3 or fewer normal land connections are flagged as no-start. Places that should actually be Mountains (instead of Border Mountains, which is what the random map gen flags everything involving mountains) were flagged as such. Anything I'm missing?