first general valuation class/valuation class

in spro, we assign general valuation group (GVC group) 3 to our product type/transaction type, but I have three general valuation class assigned to GVC group 3, when I create a deal, the general valuation class is greyed out and it is the first general val class 5 in the GVC group, so does it mean it will always get first general valuation class in the GVC group

for general valuation class 5, we have several valuation class, may I know which valuation class is used for my deal, how can i check?