All the speed achievements show your best time with seconds, but the seconds are always 0. This is especially confusing when it makes it appear that I failed an achievement by less than a second, which while possible is highly improbable: https://www.reddit.com/r/Trimps/comments/7puoy9/this_seems_like_it_shouldnt_be_possible/
(I'm told the addition of seconds is an AutoTrimps thing.)