The problem I found is that, when I import from Excel into an App a multiple item reference separate by a semicolon, Podio creates a new Item in the reference App which is the string resulting in concatenation of the different referenced items.
I try to explain better with an Example:
App "Colors" with Items "Red" and "Blue"
App "Clothes" whose fields are <Type> and <Possible colors>
If I import in "Clothes" an item "Shirt" with field <Possible Colors> whose value is "Red;Blue" (string that is normally exported to Excel), Podio will import the "Shirt" in "Clothes"and a new "Colors" item whose value is "Red; Blue" (space included!!!), instead of referencing the previous existing Colors.
I did not find any solution so far!