Last post not showing true

[CLSSY56]

The "last post" on the main board isn't showing the actual last post, even though the new post icon is showing a new post.
It is set up like:
-Board
--Sub-board
---Sub-sub-board

1.1.8
Theme: default
mods: Aeva & Registration redirection
logs: nothing except mis-typed passwords

[SMFHacks]

Not sure if Sub-sub-board are posted on the main page.  I know it does not count posting totals that deep.