Actually the movie version is an extreme edited version of the first 13 episodes that were a half hr. long each. I you look at this link here, it shows the dates of original broadcast:
As you can see at the bottom of the page in the left colum, it starts with episode 1 on Mar. 7, 1959 and episode 2 a week later on Mar 14, 1959. If the episodes were only 10mins. long then it would have shared the time slot with something else to fill up the remaing half hour block, but I see no evidence of this. It was a stand alone show like the animated series. So they just butchered the 13 ZZZ episodes to make the 75min. movie we have to use as a pilot for the '63-'66 animated series. So thanks to the butchering we probably missed some great scenes.
Tezuka often did this with his early movies. He would take several episodes from a tv show and edit them together for a movie like the '66 kimba movie which I have and also the '64 Astro movie
which combines only 3 episodes so not much editing, but still only using tv footage.