Very strange, maybe normal but I dont know
Case #1
Filezilla login with private key as su1 with :
Filezilla remote directory: /home/non-su2/public_html
produces connection in nonsuperuser public directory with no up directory possible
Case #2
Filezilla login with private key as su1 with :
Filezilla remote directory: /home/su1
produces connection in su1 directory with no up directory or even lateral directory to /home/non-su2/public_html
Is this what we should expect? Two different logins with the same credentials gives two different access permissions based on a setting in Filezilla remote directory. hmmmm