1. There is no "build queue", you can queue as many ships as you want, but you can only simultaneously build as many as you have shipyards on the planet. Or do you mean slots for ship types? They probably have a limit of the 3 existing pages (you can put additional frigates in the cruiser tab though, the game makes no difference between frigates and cruisers)
2. Are you using a mod while playing said map? If you use the stock Galaxy Forge with an unmodded game the planets should have ships (some things, like one of the cloud things, don't spawn ships by default)
There are spawning templates in the GalaxyScenarioDef file, and in there each planet is also assigned a default template. You can also manually add templates to the planets within Galaxy Forge (right-click a planet and select "edit")
I don't know more, but anyway you should elaborate on your problems so the people that do know can understand what you want.
