I made some minor changes to the boards as of recent; most notably enabled milliseconds for submissions. Unfortunately I can't make different timing rules for full-game vs IL runs so for now here's how I think we should deal with submissions:
For full-game runs, put RTA only, and exclude milliseconds. Runs are currently far apart enough that ms are unnecessary, plus if runs start to really get that close, we'd probably need to retime anyway. In the future, I could see us needing to tabulate IGT for full-game runs, but I personally don't think we've necessitated that yet.
For ILs, put the IGT total time for the track as it's displayed in-game. This is obviously the most accurate method and it's super simple to submit this way. Since I imagine most of our submissions for ILs will be from full-game runs, don't worry about bothering with RTA.
TL;DR version Full-game: submit as RTA only, no milliseconds ILs: submit as IGT only, total track time just as displayed in-game