You need to re-unlock after the update to Y. The setups should be moved to the "setups" folder and the long name of the car should become the 3 letter code (eg FXO Turbo_ becomes FXO_). There's a tool to do it in Unofficial Addons
It's the system not knowing the new path for Blackwood. It thinks you're rejoining the racing line (and thus recovering) and throws a yellow flag. I'm not aware of it being a problem for any other tracks, but I may be wrong.
To the OP: If you don't like LFS now, then that's how it is. I think a lot of people forget that LFS is still an Alpha - an *unfinished* product. We pay for S2, and the devs graciously let us play the Alpha. 99.9% of games companies won't let you play till the final release, so you should consider yourself lucky
Seriously, you guys have made life a hell of a lot easier during the course of the series. It wouldn't have been anywhere near as good as it was if it weren't for your good cheer and *excellent* sportsmanship. So a thanks from me to all the drivers, you were awesome!