[RyanJ]

The recording on an IO shared system is straight off the head amps, a proper redundant recording. This means the gains that are recorded are the gains set by the master of the stage boxes. So if your MON engineer is master, and your MON gains are set 15dB down from FOH gains, then your playback will be 15dB down at FOH, the simplest way to get around this is to set your fader levels in PT to match the difference in gain between MON and FOH...