It won't save splits the one time I tried, and importing them from splits.io offsets some time, making the timer have splits that aren't correct. Also not quite sure how to export splits.
Timer glitching when I try to import splits/save splits
It appears that the format of the downloaded file from splits.io is incorrect. I have emailed them about this issue.
For now you can fix this by adding a second column for the best run (just add a tab and type "best run" in the header row). The first column is used to store the best individual splits. You can also tell me what file you are downloading and I can fix it manually.