The moving upwards onto steel is because steel (and for that matter, one way arrows) in NeoLemmix can be rough-edged. If you play the NeoLemmix Introduction Pack, there is a level in the first rank that demonstrates this.
The rest of the issues in this post are already discussed
here, so I will close this topic - but do feel free to give your input on this matter in the existing topic! Some improvements in this regard are being made for future updates, you can see the current proposed behaviour in
Nepster's experimental version - most, if not all, of the changes in this version are going to be kept for future official releases.