When Jakes decides to move back in, there's an issue with the amount of rooms. There are seven agents in the house (Johnny, Briggs, Charlie, Mike, Paige, Jakes, and Zelanski), and apparently there are only six rooms. However, in the first episode, before Mike moved in, there were also seven agents in the house, and no issues with rooming (Johnny, Briggs, Charlie, Paige, Jakes, Lauren, and Donny). Mike took Donny's room, but once Lauren moved out, her room was never filled, so there should be no issues.
When Lil Top pulls a gun on Briggs, the hole in the gun barrel is too small to accommodate the size of the bullets in the chamber. The gun is a .357 magnum but the barrel hole is at most a .22.