the question is, what kind of continuity error is it. Is it conflicting cultures opinion of world creation, gee... that's new. It is typo related. Is it a schema that doesn't make sense within itself. Is it even a big deal?
I was watching a Buffy episode last night where Buffy's new super-soldier boyfriend riley is having withdrawal from not taking his meds.
I saw some mistakes.
1) buffy takes off her head scarf and wraps riley's injured hand. As they talk, one cut to buffy shows her scarf on her head (top-right corner of screen, almost off camera).
-They probably shot it in a few takes, and assembled the conversation.
2) riley not getting his meds handled dumbly. When the boss is killed, the 2nd in command doctor orders the soldiers to go back to their dorm rooms (above base). Later, the 2nd in command doctor is overheard saying, the soldiers are going to need their meds, or be in trouble, and they need to start bringing them in.
-if the dr. knows all this, why did he order them off the facility, instead of order them to stay on base, in a room?
3) if riley "has to to take his meds", how come the episode before, he was leaving for his folks place in Iowa for a thanksgiving weekend, and didn't have a problem (because he prolly took his meds with).
-the writers introduced the meds in the beginning of the same episode where he had a problem with not taking them, thus the previous episode didn't take them into account, thus introducing the contradiction.
Does any of this matter to the overal plot? Not really. And it wasn't obvious when I saw it the first time, but now that I'm watching disc after disc, in rapid succession, these little goofs are clear.
I believe the same is true for continuity in a D&D game. It's only obvious after scrutiny which isn't entirely likely (unless the players got screwed, and they're stewing over it).