3: Nice solution! But now it's been "backrouted". Down to 2 of each. Used the clone stacker to hold the others and took the left route instead. Here's my replay attached.
6: WillLem, good job with the outside route again, but lemmings can walk over those bubble walls, just like Crane did with his lose 2 solution. Distribute the fencers (And walkers, potentially) with the other skills, and you should get a lower record than 13.
7: Good use of the chains. Crane was able to beat your solution however by stacking on the edge of the third platform. The result is now 3 of each.
9: Now 5 of each. This is easily doable with 5 platformers if you use the green platform half way.
10: Now 7 of each. Outside-on-the-left route is not necessary here. Replay attached.
11: Sorry, WillLem, but you used 6 fencers instead of 5. However, I'm not ruling out the possibility that 5 can be done though. With the 3 walkers, shimmier and 2 platformers you've left over I'm sure this is possible to rectify.
12: Now 5 of each. Used the stackers for multiple purposes here: Holding the lemmings, and bridging the smaller gaps.
13: You actually used 13 stackers, so your result is 13 of each.
17: Not only you tried a symettrical solution, you drowned the fencer that tried to rescue those swimmers, thus your result is 6 of each, lost 1. I quickly got this down to 2 of each, lost 0. Replay attached.