Pause Rules: X
Resume Rules: X --> delayed: 0:15:00
Off: Y
When it hit the pause the X rule would be paused and then the resume would turn it back on after 15 min but it will go on to the Off command right away correct? If you want the whole thing to delay for 15 min you would use a Delay Actions as it's own part of the rule right?
Do make sure that "X" is not the current rule ("This Rule" when you choose where to apply it), since the scheduled "Resume" action would not be able to run in that case. Otherwise, your description (and the above) are all correct.