Those Astromech positions are totally logical next to this:
It’s been discussed before but… Astromechs don’t fit properly into Naboo Starfighters because the props seem to have been built half-size from Chiang’s original concept:
This is not a bad match for the angle:
A mistake, being cheap, to save time, or to fit the set? Or a combination. The best scale comparison I could find was this:
Droids roughly the same size but the ships and cockpits are about half the size.