OK, have 4 comped nights booked at MGM Grand under a Spring Buzz offer. Want to then move to either Bellagio or Aria for 3 nights using Platinum Tier Discount. MLife website wouldn't work, so I called Bellagio VIP Services and the rep said she couldn't apply the Tier Discount because it's back-to-back. Haven't we seen people book actual comped nights at different MGM properties back to back, with the only restriction being that they couldn't have the throw-ins (resort credit, freeplay) from both? Anyone ever booked a comp stay back-to-back with a Tier Discount stay at a different property? I know the website error wasn't because of the back-to-back thing. The website will let you do anything when it's actually working. ETA: Just called Aria Sky Suites and they booked the Tier Discount no prob.