[BigLew]

One thing not mentioned in this is how you have your anchor/rode set up. It is common knowledge that scope or the ratio of anchor rode to water depth is important; 5+:1. If you are in a short interval between swells having 10-20 feet of chain between your rode and anchor can make a lot of difference in such a situation. The chain will lie on the bottom and need to be lifted by the swell before any real tension is brought to the rode. In a 3-4 foot swell that ability for the bow to continue to ride up the wave and past without being "pulled" down could make all the difference. Do you have any chain between the rode and the anchor? If so, I hope it's more than the 5-6' that the West's and such sell for that purpose. Theirs is generally not enough! It might be for a 1500 lb. 15' runabout, but not for yours and larger craft!
Good luck and to my eye your pic's don't show anything obviously wrong.