I'm using Vavoom 1.15 and whenever I place multiple BossEyes in a room, surrounded by spawn spots, all of the BossEyes choose the same spawn spot to shoot at (telefrag central) I've been trying to figure out a way to check if another BossEye is using the targeted spawn spot before shooting the spawn cube, but I just started playing with VavoomC a week ago, and can't quite figure it out yet.

Yes, it searches for all spots and then chooses them in the order it found them. And BTW that's the behaviour of original Doom2.