Dead line monitoring in Block Step

Hi,

i am using block step which contains multiline container element with list of approver.

inside block step   i am using user decision step.

my requirement is to send notifications for every 2 , 5 , 7 days .

so i test dead line monitoring using 1, 2 mins

i tried to use latest end for user decision for 1 min and created 2 activitys with requested start  2 and 2 mins to send notification for 2 mins

but when 1st approver in block step approvers user decision after 2 mins and 2 approver gets user decision next remaing 2 activitys are executing automatically for 2 approver as there requested start is completed.

Please answer how to acheive dead line monitoring for 2 , 5 , 7 days.

Thanks,

phani.