I am going to tell you to not assume that the Realtor is trying to soak you. Everything you have described is normal. It takes a long time to get an answer from the banks - especially large ones like WF. Agents are obligated to continue to market the property for their seller until it is sold so from time to time you will see updates are being made.
Look at the bright side, if your offer isn't getting through, nobody else's offer is either.
I specialize in helping buyers purchase both Short-Sale & Foreclosure homes in the Minnesota Metro Area. I have worked many different deals with Wells Fargo Bank for both buyers and sellers regarding short-sales and foreclosures with Wells Fargo. I would strongly advise you to have a realtor representing you as your buyer's agent when you are dealing with any bank on the purchase of a home. I hope that is the case in this situation. You also never want to use the Listing agent when you are buying a home. Why? because as human nature will have it the listing agents loyalty is always with their first client and that is the seller. If you would like specific answers in regards to working a transaction with Wells Fargo I would be happy to answer them. Please feel free to e-mail me your questions and I will get back to you A.S.A.P.
You can visit my web reference below to learn more about purchasing Short-Sales.