Released: Exchange Server 2013 RTM Cumulative Update 2

Still confused and concerned about the storage space requirements.  As an example, if you have a 100GB volume, where you've set quota's on a database of 1GB per user for 80 user's, you've estimated a maximum capacity of 80GB, leaving that extra 20% available.  If you now have to increase the quota's by X% (30% in the examples provided), you're increasing the 1GB quota to, say 1.3GB.  Then for those 80 users in that example, that totals 104GB maximum; not only doing away with the 20% free but also going above the volume size.  I know you said it doesn't actually change underlying storage requirements, but I sounds like that's precisely what it's doing.  Any way to clear that up a bit?