Wandered in from metafandom ... and thank you for articulating this so well, because you've described a feeling that I've often had, but never really was able to put into words. :) I wonder if this feeling of being out of step with the writer gets worse the longer you're in a fandom, too -- I notice it the most strongly with fandoms where I've been for awhile, either my current fic-writing fandom (where I'm going on four years) or various comics series that I've been reading for upwards of 20-25 years in some cases. (Actually, I get it a lot in Marvel and DC when the writing teams change -- it's like I get used to one interpretation of the characters, and then have to tilt my head sideways to climb on board with the new versions, if I ever manage to do so ... sometimes I just have to wait out one incarnation of the characters in the hopes that the next team will be better. Mapping the two feelings between comics and fanfic is not something that had occurred to me before -- and yet, it is a very similar sensation, isn't it?)