Sorry to reply so late to your last posts, but for other's reference:
If the Surge Guard reads Line 1 with no amps, and the AC is running the problem is the wiring. The (front) AC runs off Line 1. It should show some amps. Even without the AC, it should show some amps. If there are no amps being used, that line has to be Line 2, since it is wired only to the AC and would not pull anything if the AC is off. Line 1 is always pulling some residual amp loads.
If the inverter reads "On", and the (front) AC runs, the problem is the wiring. If the AC is running, there IS shorepower (if no genset). If the wiring is correct the Xantrex control panel will read AC In/Charging, not Inverter On.
It almost looks as if Line 1 and Line 2 A/C inputs are reversed. You might now have quality service for both "Lines" and though reversed, all seems well. Based on your previous notes, either the inputs are reversed or the pedestal was was mis-wired. This can be complicated by a bad buck-booster (Hughes Autoformer, Power Master, Frank's Booster). Mine is currently misbehaving, though I'm aware of it and occasionally bypass it.
2003 Alpine 40FDTS (400HP)
Long Beach, CA