Join Date: Dec 2013
Location: Boston, MA, USA
Programs: UA 1K, DL Gold, IHG Diamond AMB, MR Gold, HH Diamond, Hyatt Globalist, National EE
Posts: 1,087
Sounds to me like they are making up their own rules. It says nothing about length of stay when discussing upgrades in the IHG T&C. I would definitely fight them on this if upgrades at these hotels is something you value greatly.