UA 929 ORD-SEA - 757 metal but shows C and J?
So I booked UA 929 ORD-SEA for 3/11. All websites including UAL show that this is 757-200 equipment, but it shows C and J booking classes availability. Is that a glitch? When I booked, it showed me standard 757 seat map where E+ starts at row 8. Just trying to figure it out - I hope I have some decent chances for my UG to clear(flying on H fare, so it's up there coupled with status), but still very confused as to why UA sells C and J on that flight. Any ideas?