Hyper-V VM Incrementals same size as full

Hello,

My hyper-v VM incremental backups are the same size as my full backups. The backups are going through the hyper-V host, they have GRT enabled, unticked box to run VM as full if inc is not supported, and verified agent is installed on host and VM's. BE2014 server is 2008r2, and Hyper-V host and VM's are 2008r2. Not really sure what else to try here, and I was told my symantec that this would work properly. I do not want to do agent based backups on these VM's. See attachment for picture of storage. 

Any suggestions would be appreciated.