Audio problem: When the chief of police arrives at the blood farm he is surprised by Blade and Abigail. He quickly reaches inside his jacket to draw his pistol but Abigail draws her revolver much faster. As she draws there is the unmistakable metallic sound of a revolver being cocked, but when she extends the revolver out in front of her to cover the chief the hammer is down, not cocked. The revolver could be seen in the holster with the hammer down, so she could not have been manually decocking it to make that sound.
Blade: Trinity (2004)
1 audio problem
Directed by: David S. Goyer
Starring: Ryan Reynolds, Wesley Snipes, Jessica Biel, Kris Kristofferson, Parker Posey
Continuity mistake: When Sommerfield is talking to Blade about Daystar and says to him "we're calling it Daystar", Sommerfield is standing opposite Blade. In the following shot she moves to standing by his side, then back to where she was. (00:49:35)
Hannibal King: She's dowloading playlists. You know, rap hip hop, what the kids are into nowadays. Me? I'm more of a David Hasselhoff fan.
Trivia: Wesley Snipes was reportedly unhappy with the script, and caused difficulty on set. He allegedly often refused to leave his trailer, mistreated the cast and crew and became violent at least once. He also refused to film many scenes, forcing director David Goyer to use creative means to add Snipes into them. (Eg. Goyer used body-doubles, CGI and stock footage to add Snipes in several scenes.) Other actors were given much of Snipes' dialogue because he refused to film so many sequences.
Answer: It's possible that he followed one of them back to the base. This is feasible since they wouldn't be able to tell that he was following them because of his shape-shifting abilities.