I (along with a co-worker) have an upcoming trip on a United codeshare Great Lakes Airlines trip. The flight is on a Beechcraft 1900 (oh boy). I've been seeing some contradicting seat maps, though. My co-worker is sitting in 2C, although on both United and our work's online booking tool, only the "A" row of seats appears. The flight is confirmed and set to go, but I'm concerned that she might end up without a seat.

Anybody who has been on the Beechcraft, can you confirm how many rows of seating? Thanks!