In reviewing my past Marriott emails, I recieved one dated 4/12/07 stating I would recieve double points from 4/15-6/30. I recieved another email dated 5/9/07 stating I would recieve double points from 5/15-8/15. Which one should apply?

I also have a double points for first award redemtion from 4/1-6/30 After the summer I should be rolling in the points! Base points + 1x Base + 1xBase + .3xBase right?