Added A/C R-134 without evacuating first

After replacing my compressor in a 2001 sunfire, I accidentally charged it without first having a vacuum. I thought I had a vacuum pump evacuation the system for an hour, but later I realized that the connector shutoff knobs went clockwise to open. So chances are I had the valves closed the whole time and did not have a vacuum when I tried to charge the system.
I know that mixing the synthetic oil and water vapor can produce acid in the system, so what needs to be done for the system to be ok. Does it just need evacuated properly, then charged as normal? Or does it need to be flushed again? Also, the system had only briefly had refrigerant in it. Maybe an hour or two. The refrigerant and air needs to be recovered. Then the system needs to be evacuated. Moisture and oil produces acids. Air will cause the compressor to run hot and the system won't perform properly. It is very important that the system is charged with the proper weight of refrigerant or you'll run into performance problem and possible damage later on. Using pressure to judge how much refrigerant is in the system is the wrong way to charge a system.

Most ac shops have calibrated scales that are used to add the correct weight of refrigerant to the system. So the system just needs to be evacuated again and charged according to manufacturers specs (after proper recover). No need to disconnect stuff and reflush? No, you shouldn't have to flush the oil. It would take a lot of moisture to contaminate it. When you evac, it will pull the moisture out and any moisture left behind will get absorbed by the desiccant in the drier or reciever.