At the moment, when I select the latest topics link, I'm seeing threads from the middle of 2014 showing up in various places, but I can't see any obvious reason why that would be - there are no new posts on them.
I know in some other CMS software (vBulletin for example), they can be set to bump old threads when someone 'likes' something in them - does b2evo have that capability?
It can happen if spam is posted on those threads and then deleted before you see it, or if you're not logged in and don't see the "community" messages.
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It can happen if spam is posted on those threads and then deleted before you see it, or if you're not logged in and don't see the "community" messages.