I purchased a main cabin fare SFO-ATL on a 767-400.

seat was 30C and was a main cabin seat according to seat selection map.

I boarded with main 1 as indicated by my boarding pass.

my seat was a seat marked comfort plus with stitching and the overhead bin said “reserved for comfort plus”. It was a bulkhead seat. There was no front storage and there was one of those divider walls in front.

there was maybe another 3-4 rows of comfort plus behind me. Premium select was in front of me.

what’s going on here? Was the plane configured differently than the seat selection map?