Best xxx for season confusion

Just completed a set of intervals that tells me…

“Best 100m for season 0:22 and Best 1km for season 04:18.”
Intervals.icu

But for NO part of what gets highlighted for the Best 100m did I run quicker than 3:52/km, when I’d have had to have averaged 3:40/km over the 100?

Am I missing something? It was on a flat track, so GAP doesnt come into play (I have that unticked on my pace charts).