It seems the Spam "Actions" information does not show the actions taken for each particular message, but instead what actions are currently set.
If "Spam Actions" are set to "store-spam" then later changed to "deliver", all historical messages will show the current "Spam: Actions(s): deliver" as the Spam action information.
Spam Actions shown are incorrect
Re: Spam Actions shown are incorrect
This makes it super difficult for debugging actions.