Dimensions or Planets?

[neatoman]

So there seems to be some weirdness going on with the depiction of aliens in this cartoon.

Up until recently it seemed like the aliens just came from different dimensions, the Newtralizer claimed there was at least ten dimensions, implying he also came from a different dimension. However, since then the Kraang have been shown to have arrived on earth in a spaceship, the Zog clip reveals Zog came from a spaceship and the upcoming story arc will explicitly involve space.

I've heard some explainations like "spaceships" just being a primitive version of interdimensional travel but that doesn't make much sense seeing how long the Kraang have been around and how close to the present the supposed crash was. Another explaination I've heard is that the "spaceships" are meant to travel across a planet and not trough space, but then why was Zog's vehicle refered to as a spaceship?

The most reasonable explaination I can come up with is that Dimension X is just a worm farm that doubles as a storage closet and the Kraang's real homeworld is somewhere in outer space.