[Evolution] IMAP - Junk and Trash folder appear twice

[Prometheus <pr0m gmx com>]

I am on Evolution 3.18.5.1 / Debian stretch - Gnome 3.20

On every IMAP mail account i have i get two times a Junk and a Trash
folder. The one is local and the other is the on-line folder, apart
from my hotmail account which has only the two junk folders (not two
trash).Is there a way to keep only one folder?

I also noticed that for the two trash folders, i can right click and
empty trash only the local folder and not the on-line one. Any idea how
i can correct this?

Thanks