A brood of hormagaunts deep strikes using a mycetic spore, since they won't move until next turn, my opponent moves a squad eqquipped with flamers to roast some bugs before I can charge next turn (

duh):
Can he put the template so it hits the spore AND termies behind it (yeah, they are behind the spore yet), denying cover, or those models, out of
LoS, cannot be hit this time?
Would it be the same if, instead of a staying behind a mycetic spore, the brood is just around a corner?
It already sucks having a immobile transport of "
AV" of 8 (R4=AV8 more or less), but also losing their inherent hiding cover function would be plainly racist...