it’s a newest one for US1 as far as I can see.
it’s a US1 BF. Do you know why it was interrupted? Did you have an error or the node is restarted?
It doesn’t matter. The only matter is a creation date of the piece and what pieces the BF is processing (see the “Created Before” date in the “Prepared” for retain). The date of the folder doesn’t matter.
And since you seems referring to the access date, I would assume that you mounted this drive to use atime, which slow down the filewalkers a little bit on every file. When you have millions of files it become noticeable.
And it’s logical, because this BF has an oldest creation date (and likely the oldest “Created Before” inside).
So the only question, why US1 BF was interrupted. Did you check, maybe it is finished, you need to check for “retain” and “Moved”. And this one for ukf (US1) - is a fresh one, because the oldest one has been processed.
By the way, it’s better to track folders differently: