Rule to Delete Mail After Specified Days Old Deletes Incorrectly

I set up rules to move incoming mail into folders. That seems to be working just fine. Then I added an action to that same rule to delete mail in the folder where the date received was greater than 60 days old. It asked me if I wanted to apply it now, and I said yes. It then deleted everything newer than 60 days old!

I thought I must have done something wrong, so I tried adding an action to a rule on another folder. I said to delete anything over 70 days old. It should have delete two of a dozen messages in the folder. It deleted everything.

Anyone know what's going on?

Another problem is with the rules window itself. When you have a lot of actions on a rule, the actions area expands so that I can't see the bottom of the screen where I can choose cancel or save. Can't resize the window, can't move it to see the bottom, can't even close mail. Have to do a force quit.

Any suggestions would be appreciated!

Jaime