FSLogix Containers in 4 Locations

We have FSLogix Outlook containers in Cloud Cache config and I'm seeing an issue with our disk space.  For example:

• User's Outlook Profile folder (incl. OST file) is 10GB in size.
• Cloud Cache means VHDX file is stored on network share = 10GB in size.
• VHDX file present in c:\programdata\fslogix\PROXY\<username>
• VHDX file present in c:\programdata\fslogix\CACHE\<username>

I know that there is a difference between "Size" and "Size on Disk" - but Windows is seeing the files as taking up real space.  So using the above example the C: drive has 30GB used and the network share has 10GB used.

Is this correct?  We're 100% VDI and all of our storage is actually on the same array - so we dont need so many copies.  We could mount directly to the network share and the performance would be the same.  Is our configuration wrong?