Button Stays Pushed

Buttons seem to stay pushed for noticably longer than they used to be even though I have solid 30 fps.
It has been happening since 14w25b but they worked great even on my laggy machine in 14w21b and 14w20b. I have seen a couple more tickets for this, but they all written "Resolved", though I have to admit that it seems to be less laggy in 14w34d than in 14w25b they are still laggy. Also in the console it writes quite a lot of times "[Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 13021ms behind, skipping 260 tick(s)" which is something that I thought I would only see on server console.
Easy LAN Server is sweet but it's too much to give to have server lag offline, and having redstone lag like that.