Continuity mistake: Just as the final fight between Luc and Seth is about to begin, three computer panels are shown to display Seth's different approaches to crack the code he requires to survive. While the two LCDs to the left and right have the output of a brute-force algorithm simply guessing all possible combinations for the code, the CRT-monitor in the middle shows Luc's severely injured daughter which Seth offered to heal in exchange for Luc telling him the code. However, if you have a closer look at the screen it states "HEALING COMPLETE" (even with a blinking frame around it), although close-ups of the "Rejuvo-booth program" before (e.g. at 1:08:00) and after (e.g. at 1:09:24) this shot claim it to be "INCOMPLETE". (01:08:55)
Continuity mistake: Seth goes to put his miniaturized brain into a body, that body goes into the surgery area, with hair, the laser makes the incision to a bald head, the chip is inserted then the body comes out again and has hair again.
Other mistake: When SETH goes to plant his miniaturized brain in a body, the body enters with close-cropped hair, the surgical procedure shows a bald head, then SETH comes out with the close-cropped hair again.
Deliberate mistake: If this movie takes place 7 years after the original, how could his daughter be 13? He was part of a government project, I doubt they let them leave for relationships.
Suggested correction: This is a retconned film made after 2 other direct-to-video Universal Soldier movies were made. While the film is considered non-canon in the series, in the film itself, the facts of the original are altered to allow Luc to have a daughter.
Exactly. If this movie changes things that happened in previous films than they don't make sense in context to the series, that's a mistake.
Essential the film can be considered the same as a reboot. Reboots and remakes can alter characters without being considered mistakes because they're not actually part of the film series, just like "Universal Soldier: The Return" is not part of the Universal Soldier film series. However, changes to characters in retconned films, shows, or books, by definition, are not mistakes.