At the Navy dance some of the sailors are wearing their hats inside. This is against Navy regulations, and any sailor would follow that even if they are on shore leave. When you enter a building they are supposed to take them off.
One of the young sailors has a goatee. This is against Navy regulations.
Fleet Week is usually the end of May (over Memorial Day weekend), however this episode takes place in the fall.
When Charlotte decides to change the name on her front door from "MacDougall" back to "York," she cuts out a piece of paper that says "York" and pastes it on the door's name plate. However, a close look reveals that the name plate already says "York" on it, and Charlotte merely rubs her fingers over it.