Self-explanatory title.

In the case a pre-release glitch is found to be time-saving or efficient, would a run on that version count? ex: 2nd pre-release for v0.10 being counted as a valid run compared to something like a v0.10.1 run

yes im pretty sure. the 0.9 (prerelease) update released recently although its called 0.9 on the leaderboards. for the public release, there is an im assuming less fleshed out version 0.9a that released publicly, and that is also there. since the full 0.9 release is releasing eventually except the pre release is under the same name i assume this is how it works.