I have four Skype accounts that I use regularly and I manage all of them through the Skype Control panel, all of them are configured to automatically have credit applied from the pool of credit.
But out of the accounts, only one of them auto-updates the credit. One of them is a SkypePro account, and I fully accept that there is an issue there. But the other three are standard accounts with nothing special on them, so why doesn't it work?
The fact that it doesn't auto update causes some problems. I've run out of credit a couple of times now, fortunately not mid-way through a call, but it kind of defeats the purpose of auto-credit.