Hey rrkaiser
You found a way and it worked beautifully!
Very good questions and ones I hope to provide answers for. When you are added features it will be a prorated amount for the remaining portion of the cycle, so lets a $9 feature was added 10 days into the cycle you would expect if you had a balance on the account that it would deduct $6 as that would be the amount for the remaining 20 days.
The most important thing if you have a balance to keep an eye on that and if you see movement that is unexpected give us a shout we will be happy to look through your account.