Sort by "Updated date" results not sorted by the updated date (timestamp)
This is due to caching. The individual entries are cached with the "x minutes ago" text and do not get updated until the cache expires. The results are in the correct order. I've created https://github.com/JasonBarnabe/greasyfork/issues/573 for this.
Also note that sorting by updated would not list the new scripts that have not been updated.
Sort by "Updated date" results not sorted by the updated date (timestamp)
Why do I care?
I don't really :-) I just thought it might be an oversight/easy fix.
Why do I want this feature?
I don't want to post my scripts to multiple sites, just the most popular site. I just checked the other site for the first time in a while, and noticed that there are only a handful of scripts posted there each day. I came here to do the same search, and while this is still clearly the #1 site 🎉, I was perplexed by the results: