Thanks Daikoru, I've changed the art, and that fixed the sphere problem, I appreciate that. Unfortunately, now the game is crashing as soon as the Uberlisk starts attacking enemy units. This is strange because that wasn't happening before, and the art is the only thing I changed. I also noticed (now that the art is correct) that the spine crawlers are off center. All 6 of them are on the right side of the Uberlisk's head, rather than 3 on the left and 3 on the right. They are in the correct "V" formation, but slanted off to one side.
Also, I am getting sound, so I'll try to offer some help there. In the weapons tab, my "Impaler Tentacle" weapons have AttackImpact and AttackLaunch sounds (at the bottom left), and they should be from the Attack Actors section of ProzaicMuse's tutorial. I'm just guessing on that, but hopefully it helps.