High electric bill for no reason

Try running just one AC at a time to save money. There's no need to run the bedroom AC when you aren't in the bedroom, and if you are needing a little air blown-in from the galley and living area, say while taking a shower in the hours you're using the galley and living area - just use a floor box fan. When you turn-in for the night, cut the living area AC off, and use only the bedroom AC. Keeping the bedroom door closed will further localize one AC unit at a time. Pretty easy solution.