Pretty much this ^^
Paviel, can you at least accept the idea that Jim was not saying Mab was lying, nor was Uriel? It might have been better if Jim had used the word "wrong" or "false" but he was trying to use a word that has particular emphatic value, and "lies" isuch better for that than the previous possible examples. I agree with others that it would have been clearer to phrase it slightly differently, but the intention is clear enough...and the 2011 statement more than clears it up.
In any case, I wouldn't worry about it. Easier and happier to accept that Mab didn't lie, than worrying about an apparent inconsistency for too long - accepting the arguments that Mab didn't lie will probably be better for your enjoyment in the long run (unless you're a masochist).
Jim isn't a perfect writer and I think it's good as fans to do our best to try and understand what he was trying to do. If we hold his writing as gospel and immovable then we hold Jim to an impossible, ridiculous and unfair standard (not that you are, but in general). Jim is only human after all, and these stories were written mostly for fun.