Mark,
I keep going back to your initial complaint: oil coming out the dipstick tube. That specific issue has no relevance to oil pressure. Oil coming out tube will only be caused by higher than normal crankcase pressure (blow by) which goes to what others have already mentioned -- restricted crankcase breather filter or tube. Fix that and your dirty toad problem should be resolved.
Then regarding oil pressure. As has been mentioned, overfilling could be a factor there. Specifically, as Ray D. posted, your dipstick markings could be inaccurate, a common issue I've noted others mentioning on the forums. Inaccurate markings could lead you to overfill which will cause numerous problems. And the engine will almost certainly "get rid" of that excess oil all on its own. Before spending money on diagnosis, you could confirm or eliminate this possibility by draining your oil then carefully measuring and refilling with the amount of oil stated in your owners manual. After filling, check your dipstick. If accurate, press on with further professional diagnosis. If stick is off, use a fine-cut file to create a new (accurate) full mark on the side of stick opposite the factory marks.
Hope this helps, best regards,
Lou S.