Why is the PAPER SIZE pull down list different between my 2 identical MFPs?

Indesign 6 - Toshiba MFPs with PS3 Drivers.

I have 2 of the same models Toshiba MFPs - 5560c, and using the Universal PS3 Driver under Windows 7 PC.

Why is my Paper Size pull down list different between to the 2 MFPs?  The main reason I ask; I don't leave it on "Defined by Driver" because that affects full bleed with crop mark printing, so I setup the driver first (say 12x18), then come back to the InDesign dialog and select a paper size.

For my scenario I need 12x18 - which shows in one list but not the other. Aside from that the lists are totally different - why is that?  How can I manage that list?

Thanks,

Pat

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