Anyone explain why this flight was so low?

Well having a scheduled alt of 36,000 ft. and only going up to FL230 and below. And also making 4 left and right turns during departure makes me wonder… … /KBWI/KATL

Might have had an MEL that restricted them to below a higher alt.

Right, perhaps weren’t RVSM compliant for that flight?

FL 250 is a magic altitude if you have pressurization or oxygen issues. Strong headwinds or turbulence at higher levels that day. F/O had a nosebleed.