1994 Toyota Camry replaced system, recharged, 2 days releas

Air Conditioning problem
1994 Toyota Camry 6 cyl Front Wheel Drive Automatic 140K miles

I recently decided to fix the A/C in the wife's car. I bought new A/C compressor, drier, & xpansion valve. Change everything except the xpansion valve because it involved pretty much takin all the inside out of my car to get to it. Me and a very good mechanic friend (who always helps me on repairs on all my vehicles) flushed the system with the a/c flush while the compressor was off and the drier was off. Then waited over night because it got late and we wasnt sure how much pag oil to put in the compressor. Next day, I called toyota dealership and talked with mechanic to decide on the pag oil, then blew the lines out again with an air compressor to make sure it was clean. Installed compressor and drier back in place, put rest back together. When my mechanic friend got home from work we pulled a vacuum for 30 minutes, then closed the system off for 30 minutes to make sure there was no leaks and then added refrigerant. We got the temp in the car blowing 40 deg. We thought the pressure was high, we had to bypass the compressor switch to turn on the compressor till we got enuf freon in, then it stayed on by itself and we reconnected it. Now here is where we were worried, the compressor never shut off and on like it should have. Now, there was a ground wire that come off the clutch that I Believe was connected to the bottom of the old compressor, I forgot to connect it back to the bottom so we just run it to another ground source on the car (just under the hood near the radiator). Also, I had to buy new spacers for that went btwn clutch and the magnet, there was 3 in the pack but 2 made it where the magnet spun freely. Two days after letting my wife have it back it blew the high pressure line off the back of the compressor and released the pressure.

Any idea's on what we could have done wrong?

parts were bought at O'Reillys Auto, it is 3.0L LE, and it is push button