Number of days value in Oulook rules truncated

When trying to create a clean-up rule in Outlook, I set as the criterion "days since receipt".  I specified 5 years which is about 1825 days.  I noticed as I entered the value that a comma was inserted after the one.  The action for the rule was delete.  When I applied the rule (fortunately to a folder I did not care about, all items moved to Deleted.  It turns out that when the rule is saved, the comma and all subsequent digits are removed leaving the number of days as "1".  I experimented for a while with the rule editor.  The comma is always inserted and it cannot be deleted.  Saving the rule always truncates at the comma.  Counts less than 1000 have no problem.  Are there any others who've seen this?  Know any workarounds?  The behavior seems undesirable.