How do you deal with coworkers who just don't listen!

My schedule is 10-7 M-Th and 10-4 F, and I stay late on Tuesdays when needed......so WHY would you make an appointment for me at 7 on MONDAY?!?!?!?!?!?!?!

Also, the contract has no information on it, which is supposed to be submitted beforehand, and no notes telling them to submit it either.

Also, the person who made the appointment always says, "well, they need to work around your schedule or come in on Tuesday, your late day"........ And this is a person who is supposed to become a partner and makes double what I do and is completely inept.

I just don't get it.....

As if I'm not here all day twiddling my thumbs JUST so I can have an appointment as I am supposed to be leaving....just great.....

Thanks for the vent.