That's fair to think there was only a series because after the movies were done and the series came out they cut the movies into series length episodes too (now the movies are season 1 - I don't know if that was the plan from the beginning).

Maybe some countries then also only got that format. Anyhow the movies were the ones with Eva Habermanm as Zev, so thats how you can easily distinguish them.

Since the movies were produced in part with German involvement we got them long before the series in our TV (I think it was the channel vox) and at that time it was something to look forward to as a scifi fan.