Continuity mistake: It's raining heavily all night, but when Burnham goes up on the roof to look for a way in, you can no longer hear the rain falling on the window. Later on, we see the rain falling heavily again.
Suggested correction: Rain does that all the time. Starts and stops, drizzles and pours. This is not a mistake, but rather how Mother Nature works.
Continuity mistake: Junior's right arm is set on fire, but afterwards, he is stretching his left arm in pain.
Continuity mistake: When Sarah lays down in bed, the towel is still around her head. But a second later, the towel has gone and her hair is dry and brushed.
Other mistake: Raoul told Junior he wanted ⅓ of whatever's in the panic room, but Junior told Burnham only the two of them (Junior and Burnham) knew the money was in there.
Suggested correction: Like you said, Raoul stated he wanted 1/3rd of *whatever* is in that room. He doesn't know what's in there, but he would assume it would be valuable.