I’m having a problem with a Lookup column. I understand the limitations with which column types can/cannot be used for Lookup. What I do not understand is why, once I choose the column to use for lookup, I cannot choose a secondary column with it.  Please see below-the option is grayed out. Any assistance is appreciated!
Was “Contract Admin” created in Visual Studio? What kind of list are you working with?
Can you select multiple columns with Lookups for other lists in your environment?