The AI War 2 backerkit extended funding is ongoing! We're working on that fifth stretch goal!
Aww man! This level changed several times during beta, and so certain things became impossible in 2p it's clear. I should have done a better job of checking it, sorry. I'll get that in the morning; unfortunately it's rather late now. If it's blocking you, you can crack it open in the level editor (it's level 014 I think) and then switch to background placement mode and just right-click one of the haybales. That will get you past in the short term.
This was fixed on March 25th, 2013, actually -- in version 1.005: http://arcengames.com/mediawiki/index.php?title=Shattered_Haven_-_Beta_Release_Notes#Official_1.005_Stantonsburg.27s_RevengeIt sounds like you haven't run the in-game updater. If you click the play button, then you'll see a thing that says new updates. It's a really straightforward process to walk through that, and it updates a number of things as you can see in the above release notes.Cheers, and welcomes to the forums!