Is the fog on with high beam year specific? Mine said it wasn't compatible. But also said fog light enabled wasn't compatible but it was when I first received it. Sent a bug report but no reply yet.
Did you open the filter to inspect the entire filter? Like another member posted, if it hit any moving parts it would chew that apart and leave the oil with a glitter and metal fragments everywhere. Not a good look but more than likely okay.
Installed a updated batch this month. Just Spent a week down in hatteras with flooded roads. Not a single rust spot. The amout of salt down there things get rusty fast.