modlog view is a bit broken currently and doesn't make much sense if you don't know how it works.
the modlog view currently merges the different types of modlog entries in a single view, but the pagination doesn't make much sense that way.
for example, removing a comment is an action that happens quite frequently, but removing a community does not. the modlog shows e.g. up to 20 actions per modlog entry type, so you may see comment removals for the last few hours, but community removals could be for the past year. then when you hit next page, you'll see the next page for each type, but the times make even less sense now. you'll see entries 20-40 for comments, but also 20-40 for communities.
the timeline will be consistent when you filter for specific entry types.
0.4.1 is pretty old, but the link you provided leads to a manifest.toml that seems to indicate 0.5.17.
pict-rs introduced temp file cleanup in 0.5.10, but that might not have cleaned up old media if you only recently upgraded.
from a short look at the repo i didn't see where
/lemmy/magick/
is defined, so i'm not sure if that is indeed the pict-rs temp folder.