After reading your post, I looked up fanwank at the
Urban Dictionary. I had never heard of the first definition, but the second is the one I've always used. I may be wrong, but at least 53% of people, based on votes, are as misinformed as I.
I don't think I've ever seen a long-running work of fiction that did not eventually have contradictions or continuity lapses. Of course, I'm the sort of OCD personality that tries to map all the cited cities and sides. YMMV.
As for the example of Unaroyal's Thinkamancer, I wouldn't call it a contradiction, but it
is a continuity lapse. We know, at the end of the Battle of Gobwin Knob, Bunny contacted Unaroyal's
Thinkamancer. We know Queen Bea ordered to the Magic Kingdom all her casters--Vanna, a Turnamancer, Jeftichew, a Carnymancer, Bowie, a Changemancer, and Spenser, a Findamancer. She did not mention a
Thinkamancer. In fact, while she mentions sending countless messages via Magic Hat and abusing Bunny's services, she makes no mention of using her own Thinkamancer. We know that Wanda has yet to decrypt a
caster, so there goes one possible fate of Unaroyal's Thinkamancer.
There are other possibilities of course. Ansom stated that a coalition as extensive as the one formed against Gobwin Knob was a
hardship for all sides involved. It is possible Unaroyal was required to hire a Thinkamancer from the Magic Kingdom to help coordinate their efforts with those of their allies. After the coalition dissolved, Unaroyal released the Thinkamancer from service. This is probably the best explaination, since it would have the Thinkamancer be a temporary acquisition. The duties involved meant the Thinkamancer did not have any remaining juice after the turn for Bea to use on personal communications or that such communications fell outside the contract. The other explaination, which occurs to me, would be that Unaroyal's Thinkamancer was croaked during Gobwin Knob's offensive, and, for whatever reason, the body was not claimed so that Wanda could decrypt it, although that begs the question why. I doubt the Thinkamancer was disbanded, although it is a possibility. I'm sure there are other explainations that would avoid a retcon, but there are inconsistencies within the information provided. Fans may speculate as to the reasons behind it, but since speculation is necessary, I called it a fanwank. As I mentioned in the beginning, my definition may be wrong, but I stand by what I meant.