Question 1 is already answered in "client.conf"
if you still use "equo cleanup", then the whole idea behind packages-delta can be thrown away, along with your post.
Did you sort out your mirrors? "equo repo mirrorsort <repository>"
It sounds like some mirrors are taking too long, or are out of reach.
If a package fails to download, Entropy automatically tries the next mirror in the list.
please read this section of the Wiki: https://wiki.sabayon.org/index.php?titl ... _or_mirror
To add/find more mirrors, close to you: https://wiki.sabayon.org/index.php?titl ... positories