Huge incrementals with Ghost 15

After I updated to Ghost 15.1.0.36526, I am getting huge incrementals, to the point that they are sometimes even larger than the last full, even with little change happening between backups, which doesn´t make any sense.  I didnt use to see this behavior with Ghost 12, which was my previous version.  All along I have been using Diskeeper with the VSS-special setting set, to avoid any excessive unnecessary incrementals, and I had the same thing running also with Ghost 12, and I didn´t have this problem.  Now, my backup disk gets full after 3-4 backups, and have to delete everything to be able to do one more backup.

 

My schedule is one monthly full, and two weekly incrementals.  I wished I could do daily incrementals, but it is impossible with this problem.  In fact, now I can never get to the end of the month without deleting everything on the disk because of the huge incrementals.

 

Any thoughts on how to solve this?