Yes, I've noticed this too.
WUArchive is completely trashed due to a RAID failure, and it doesn't look like they'll be hosting Aminet without a sponsor once they're up and running again :-(
Something's very wrong with the UK mirror.
The main german mirror is mostly working, but the ftp interface seems to be operating strangely.
I expect the problems with the non-US mirrors will be resolved soon. WUArchive has been extremely unreliable the past few years anyway, so hopefully a new US host will be found.