DS9 was straight syndication, so it was often on stations with PTEN shows, because PTEN only had 4 hours a week of programming at its max. If you saw Voyager on that station it was likely one of the Chris-Craft ones. Chris-Craft itself had put up a lot of money for season one; in season two the stations themselves had to make up that difference when the company backed UPN instead. A lot of other independent stations were added at that time. Since UPN and WB didn't have full week schedules at the time either it was possible to see all the UPN/PTEN/WB shows mixed on the same channel.