Well, I decided to call and speak with customer service, and according to the cast member I spoke with, you may combine tickets for an AP, they simply apply credit for the current rate of the tickets you already purchased, towards the cost of the AP. They stated this only works with Tickets purchased through Disney or an authorized 3rd party seller, and can be done at guest services in the parks. if I wasn't misinformed by Disney this is a great way to save money that I stumbled onto by accident.
I purchased 1-7/day park hopper for $412.00, gate price is $516.53 and one 4/day base ticket for $369.95, gate price $452.63, which means the total I paid was $781.95 for tickets worth 969.16. the current rate for a platinum+ AP is 925.49, Not only will the price of the annual pass be covered but there should theoretically be a credit of 43.67! This would be a truly great savings especially when you consider the additional benefits of 20% discounts on selected food and merchandise that AP holders enjoy! Ill keep the board posted and let you all know how it ends up going