1. My ratio has increased from 0.027 to 0.285. Is it enough to become unwarned?
Yeah, it should be enough.
2. I live in the US, can I get in trouble for seeding your torrents at any point?
Theoretically, yes, but the chances are pretty low. To be on the safe side, avoid extreme shotacon/lolicon manga,
Bleach,
Naruto,
One Piece, and other high-profile shounen titles. Everything else is mostly safe