Until I saw that the mods just straight up allow cheating that has been disavowed by the entire speedrunning community for years. 0second bugs do NOT mean you beat the level in 0 seconds. This has been established for YEARS. I could take 55 years to beat a level and still have WR. So I'll come back in a few weeks or months to check out if that's changed. Was really excited to run also. =/
I agree, level runs (and every category) should be timed in rta. I mentioned this 2 months ago and I don't think the 0 second time is fixed yet. So it might never get fixed, should switch to rta and retime the current runs.
The devs have put out an update blog and the timer will be fixed sometime this month, so within a few weeks. When this happens the leaderboards will be changed for individual levels.