Time differences in the Spa's

I've only been hobbying for a few months now, but had the chance to visit a few spas. One thing that I have noticed, and just want to check if others feel the same way too, is the different way the time is being calculated at different spas.
Whenever I visit Platinum, I feel the time starts when the lady enters the room and the full time will be spent on the massage. The shower before and after is not calculated in the time paid for.
Whenever I have been at Muse, I'm usually in and out of...

Time differences in the Spa's