I don't really have much problems with contradictions. If it's something big I just do what some call "mental gymnastics" to get it to work. For example, when reading Federation
I mentally changed some dates, imaged some extra scenes, and "deleted" a few scenes. Like at the end
One thing that is somewhat annoying is when you have one page that says something different than the previous one. For example, in Mission Gamma: Cathedral
But when things are that small, I just tend to shrug them off and continue (even though it does stick in my head for a while).