Continuity glitches

Most of us terminal tragics, with our fingers glued to the Rewind button, have noticed the 'he's wearing a jumper - no he's not - yes he is again' scene, but has anyone also noticed, in the dance hall scene where Carlisle is interviewing the prostitute and plying her with coffee and cake that, right at the end of the scene, he takes a sip of coffee with his finger through the cup handle; we cut to her and see that his fingers are gripping the cup around the rim; and then we see him with the cup and his finger is back through the handle again...........We are 'meant' to view the scene as a continuous whole, but here is evidence that there were at least two takes that have been cut together.
Yes, I know I should get a life and, when my obsession with Carlisle dies down, perhaps I'll discover what happened to mine. In the meantime though - how hard can it be to work as a continuity assistant on the set of a David Tennant film? Clearly, it is a job where one finds it hard to remain concentrated LOL Me? I'd gladly take on the risk.


ETA I'm wondering about a couple of scenes b/w Carlisle and Natalie: eg, when she arrives home to hear the phone message about Danny being about to be interviewed by Carlsile, her lipstick is pink; when she is in the corridor of the police station, after her showdown with Carlisle, she has much darker lipstick and is wearing a rather harder lipliner as well..........The self-same thing happens in the scene in the kitchen: when she is stacking the dishwasher and talking to Shyanne, the lippy is pink and the line is naturally soft. When she opens the front door to speak to Carlisle, her lipstick is darker and the outline harder..........I know they film scenes and parts of scenes at different times and often multiple times, but I thought a continuity person was meant to take care of this stuff?