Yea, looks like they are still having customer service problems…that's a shame. But to answer your answer about differences between evolution/revolution, i found this on their site:
"FAQ: Which is better – Evolution, Revolution, or Mirage series?
It is mostly personal preference… they all have the same interior dimensions…
• pick the Evolution if you want to remove the outer fly and only use the mesh netting body and poles; the poles attach to the inner body and the outer fly covers the body and poles…
• pick the Revolution or Mirage if you want to be leave the interior attached so it can quickly and easily be set up or taken down as a one piece shelter, which is especially nice when it is raining since rain will not get into the interior. The interior hangs from the outer shell and the poles attach to the outer shell.
• pick the Revolution if you want to remove the interior. The Mirage interior is permanently attached and can not be removed.
Since the poles attach to the outer shell on the Revolution/Mirage series the structure is stronger and more storm worthy than the Evolution series… also, the Revolution interiors can be removed to create a very storm worthy single wall shelter since the poles attach to the outer shell."
So my understanding is that the Evolution is a true double layer tent, where u can have just the independent net tent freestanding for camping use, while the Revolution has a removable interior netting, that is not freestanding on its own