This is absolutely NOT normal. My first couple filters were jam packed before I got my S&B and never did my clean side ever have even the slightest film. 3000 miles later, my clean side has never had to be cleaned and looks brand new.
You have a leak on the clean side. There have been a few with bad gaskets but there have also been several with improperly fitted and/or loose tubes on the throttle body.
When I heard that at first I called BS, how can dirt travel backwards??? Then it was explained that the engine pulses actually cause air to move back an forth between the intake tubes (as one intake is closed, the other is open and momentarily decreases pressure and draws air up the opposite tube). If there is a leak anywhere in the tube, that turbulence will cause any sucked in dust to travel from one tube, up into the clean side and back down the other and put a light film on everything. The more the filter gets coated with dirt and begins to get restricted, the more dust will get sucked in on the clean side.
A leak on the clean side may also explain why the filter minder may not have worked properly.
If the compression is still good and it isn't using any oil, you might be OK. You are in Utah so bring it to my shop and we can scope the cylinders with my camera through the spark plug holes.
In any case, I'll give you 12K cash!!!