Problem with 'Date last opened' rule

I'm pretty sure this is an OS issue as it only started happening today (before I installed the Hazel update) but I wanted to raise it.
I have rules set up on folders that automatically move files that haven't been opened within a certain period. I noticed that a file I had just opened (PDF in Acrobat) had been moved to another folder when the rule is not opened in the last 2 weeks.
I checked other folders I have that use that criteria and it was the same. The last opened dates seem fine when I check in Finder.
I have rules set up on folders that automatically move files that haven't been opened within a certain period. I noticed that a file I had just opened (PDF in Acrobat) had been moved to another folder when the rule is not opened in the last 2 weeks.
I checked other folders I have that use that criteria and it was the same. The last opened dates seem fine when I check in Finder.