Continuity mistake: When Tony shoots Manny after he finds out that he has been with Gina, she runs to hold his bloody body, in turn getting blood on her robe. A few scenes later, when Gina comes into Tony's office, wearing the same robe, it is perfectly clean and there is no sign of any blood. (02:27:50 - 02:30:00)
Suggested correction: Actually, blood is visible on her robe in the close up shots of her. A spot can be seen on the edge of her robe right at chest level.
Correct, but she gets blood all over both sleeves. That blood is gone. Other than the spot you mentioned, the robe is pretty much immaculate.
Continuity mistake: Angel is killed in the tub in the motel, but his body is not in there when shots of the tub are seen. Also, if the body were still in there, Tony and the other man would not be able to stand or move back and forth as easily as they did as they would be slipping and stepping on body parts.
Suggested correction: Well, the Colombians probably untied the body parts and tossed them aside so they could chain Tony up. But the parts aren't shown on screen because, well, the MPAA objected to these graphic images, thus the original X rating.