Adding a/c and other roof vents

I just added a 2nd AC to my Keystone 3712 in the bedroom. The company that did the installation which is from Starke FL. did not put the second ac on the another 30 amp breaker and it kept tripping the 30 amp breaker when you ran both ACs I called the company in Starke Fl to come out and wire the AC install correctly and they have an attitude problem. I make a mistake in chosing this company to work on my AC install. Learned another lesson, ask more questions about what there certifications are, do they have proper licenses, etc. The man that did installation did good job and even mentioned he should check for correct breaker placement. Got busy, in a hurry and left without correcting. Called for them to come back out and the owner? came out with attitude and when asked basic electric opinions he felt challenged I guess and I told him I did not want anyone working on my TH that was not qualified. He left in a huff. So I guess the answer is when the second ac works it works fine you just make sure as stated earlier they do not put both ac on same 30 amp breaker. Sorry for a bit of a rant but I am becoming more worried about how easy it is for people to buy off internet and become technical experts. I paid close to $1000 for 13.5K ac with install. Sorry for rant, hope this info helps next person. Thanks