As great as they are, their systems seem to be rather 'glitchy' at times. 
The last two times I've received a CLI on my Sam's Club MasterCard (one time using the button, the last with CS) my new credit limit and cash advance limit were updated immediately, but later when I went back and checked my cash advance limit had reverted back to the old amount (this happened both times). In both cases, when I checked again the next day it was back to the 'new' increased amount.
It's wasn't a big deal, but the first time I thought they had changed their mind or that I had mis-read the screen... the second time I remembered it happening before, and sure enough it corrected itself.
FWIW, a week or so ago when I logged into my Sam's Club MC account, I got a different landing screen before being shown my account - it wanted me to verify my personal information was correct, and said they were making changes to their systems. Hopefully that means they are working out some of the 'bugs'! 