Misting is not normal. The pump compartment should be basically dry, although there is usually some oil in the area, not the top or high up the sides, from misc. seepage. I would have someone run the main slide in and out while you watch for something to spray. If this doesn't work then you might try the jacks (should be more pressure on the system). Last I would clean the area up as best as I can, run the system again and then check for fresh oil. You might also make sure that the cap on the oil tank is properly secured.
Las Vegas, NV
Had: 2007 Limited SE 40fdts