Yes, but those are still just minor tweaks in a story whose conceit is that it's a direct continuation of the film's story -- even to the point that the main plot of the pilot episode arises directly from the murder of Sikes's former partner in the movie. It's not intended to be a "reboot" in the sense of something that starts completely from scratch and ignores the original continuity. Its pretense is that it's a direct continuation of the movie continuity -- but, like virtually every TV series adaptation of a movie in history, it maintains that pretense even while intentionally changing aspects of the movie continuity to fit its needs. As I said, it's a mistake to assume that a continuity has to be absolutely consistent in actuality in order to count as a single continuity. The issue is whether the storytellers intend to pretend it's still the same continuity.
Look at Galactica 1980 versus Moore's Galactica. In the original BSG, it was very strongly indicated that the "Eastern Alliance" bad guys encountered toward the end of the season were spacegoing descendants of Earth humans, placing the series some centuries in our future. But in order to make the sequel series cheap enough to help amortize the expense of the original's sets and effects (which was the only reason G1980 was made at all), that was changed so that it was 1980 when Galactica reached Earth a generation after the original show. But in other respects, G80 was clearly meant to be a direct continuation, with the same sets and technology, older versions of several of the same characters (in some cases played by the same actors), and even a sequel episode revealing the fate of Starbuck. The continuity change constituted a retcon, not a reboot (even accepting the vernacular sense of "reboot" as a Moore BSG-style continuity restart).
And that's what the changes in Alien Nation were -- not a reboot, merely a retcon.
