Sums the size of those transferred at the beginning of the episode cannot be transferred by account holders alone. They must go through the financial institution's funds transfer processes, which will always require authentication for large amounts. Most financial institutions will not even take a verbal authorization for an amount over $1 million but require a written (and signed) letter from the client. It certainly can't be done with a laptop through the bank's website.
When Reddington is threatening the man in the bed, he fires his gun twice. Because it is a semi-automatic handgun, it reloads and is ready to fire after each shot. After the second shot, he puts the gun to the man's head and a gun cocking sound is heard. Because it had already been fired, it would be impossible to cock it.
When Dembe is talking to the man in the mosque he has his hands by his sides, but in the next shot one is behind his back and holding onto his other arm. Then in the following shot, they are both by his sides and then they are both behind his back.