I don't know why that would be exept to say that maybe updated windows pe drivers for the mass storage controller would assist with the drive being seen correctly compared to the generic drivers that ship with windows PE.
But here are 3 follow up things to try or questions that should be answered.
1 when you boot to windows PE if you exit the ghost screen and are just at the command prompt. Can you navigate from the command prompt to the hard drive on that system and determine the size of the drive and can you see the data properly in windows pe (remove ghost from the equation) If windows PE can't see the drive correctly Ghost won't either.
2 From the same command prompt use the Diskpart command to list the drives and then partitions and confirm that the windows diskpart tool can see the info correctly.
3 Can you upate the firmware on the system. A lot of new systems come shipped with a bios/firmware that is now outdated and the manufacurer has already corrected issues seen and so for one system it would be worth testing a firmware update on.
4 (I said I had 3 so this one's a bonus?) In the ghost boot disk creator when you are making a boot disk there is an option to add aditional windows components to the disk. It is one of the later steps on the boot disk creator. Select to include the enhanced storage check box. According to MS these files are only for dealing with bitlocker but I have found success with SSD drives that were not seen correctly by windows PE being seen correctly after I added this MS component to the boot disk.
5 (sorry I can go on an on some times) In the bios/firmware check to see if there is a "fancy" option for the drive that could be chaned to a more standard option. An example. Lots of Dell systms would ship out their singe disk systems with the bios set to RAID mode but they were only sigle dives and not raid. This option caused issues for windows PE and then for GHost to be able to see the drive nativly and then image it. Once the bios was set from RAID to AHCI they worked fine. This new system may have some simular option in the bios/firmare that could be tested.
Hope it helps let us know what you find.