First hand, playing acol, aren't you supposed to bid 2
♥ with the West hand? I always liked the style of supporting on 3 cards in acol, since it has some preemptive effect. About the rest of the bidding, I can agree until the 3
♠ bid. 4
♥ is pushing it without good reason: opps have
♠s, you have
♥s, it's survival of the strongest, in this case
♠s. You only have an 8 card fit, opps have 9-10
♠s, LOTT tells us to pass for sure.
South's initial pass was ok, you have too much
♥s for a Dbl. The only alternative is 1
♠ imo, which I would bid.
2nd hand, I just don't understand why West jumps to 4
♠ 
You're in a misfit auction, p has length (and probably some strength as well) in
♣s, and you might be blocked in certain suits. A simple 2
♠ should be more than enough imo.
Obviously you were quite unlucky that the suit was split 7-6-0-0, but still, 4
♠ is a very poor bid imo.
"It may be rude to leave to go to the bathroom, but it's downright stupid to sit there and piss yourself" - blackshoe
Both pairs play acol
E- S- W - N
1♥-p- 1nt-p
2♦-2♠-3♥-3♠
4♥-X - p- p