I stepped away from them for over a week, and it's not gotten any better for anyone because they are fundamentally broken.  I wish for them to be removed at the earliest possible convenience.  From a game designer's perspective, they do not meet the standards required.

For my part, I'd just say that if I gave the impression I was upset by these levels, then it was unintentional and I apologize. If any level frustrated me to the point of experiencing negative emotion, I would just step away from it.

R1 is broken because it uses elements of the intended solution that can not be patched.  R3 is broken because the blockers can be used in alternative ways with good timing.  Therefore both levels are broken and I want to smash my computers to pieces, but it is more rational and logical to remove myself from the equation for the greater good and to preserve the rationality of others.  If my work upsets others, then it must be destroyed.

I stand by my cold and potentially irrational choice.  R1 and R3 are not suitable levels any more, because the fact they are fundamentally broken.  R1 can possibly be saved by locking the release rate, but I hate doing that and it's against the rules anyway, and I do not want these levels to continue poisoning the collection of good levels out there.  R2 can stay, but it is much, much worse than the other levels in the set.

That I would leave up to you. I'm not actually frustrated with needing to keep resolving your levels...yet anyway. I was simply in agreement with the sentiment that it can get frustrating where players think their solution is/must be intended, only to be told later on that it's not. Nothing is more satisfying to me than being told that I finally got the intended solution to a level after some updates It can get exhausting with needing to repeatedly resolve updated levels, yes, but as I have been told by some, including you, in the past, eventually there comes a point where further fixes might not be worth it anymore because they might result in the level not looking as good anymore, more fixes might do further harm than good, etc. I think I've gotten somewhat better with letting some acceptable alternatives/variants slide in my more recent stuff, but in my really early stuff I was kind of the same way with not accepting even solutions that differ in one detail. So, I can relate with needing to release so many updates, though I think this is more that I'm just not as good at backroute fixing as I thought I was!  

I hereby formally request that Lemming Ledger and Reverse the Polarity be removed from the contest and all copies be permanently deleted.  The levels are completely broken and do not meet the high quality that is expected, and thus they are unsuitable for any kind of level pack or competition entry.  Furthermore, considering the frustration being born out of the playtesting, I do not wish to continually contribute to those negative emotions.

Lemmings Revolution Level 11-10 ("Lemming be thy name")

The following video shows my solution (see also my posts above) to achieve the "maximum lemmings saved record" for this level mentioned by LemSteven (57 out of 60 lemmings). I optimized my strategy slightly in terms of time, so that there are still over 2 minutes left at the end.

Do you want me to stop updating then?  I'm sorry for all of the frustration.

EDIT: I give up.  R1 and R3 are broken.  Two levels broken.

OK, got another solution for updated R1. It uses all the skills this time, but looks a bit fiddly and hacky, so probably another backroute

EDIT: That was an obvious overcomplication. Did it again, but this time saves more than one skill, so definitely a backroute. Like @kaywhyn, really struggling to see what is intended here.

That was quick! I'm still working on the latest R1, haven't managed to solve it (or backroute it) yet! I assume my R3 solution was also acceptable - it's pretty similar to @kaywhyn's; a subtle difference in execution that allows the saving of a different skill, but the basic idea is the same.

Another resolve for Crane's R1 and sadly another backroute which unfortunately also seems to be going backwards and further from intended again because this time I managed to save even more skills I do agree with @JawaJuice when he mentions that it can be just as frustrating for players thinking their solution is/must be intended only to be told later on that it isn't So yea, still have no clue on what you intend here for R1