I booked a RT ticket CDG-DTW-GRR

They posted as:

Q/Q DTW-CDG
Q/Q GRR-DTW

V/V DTW-GRR
Y/V CDG-DTW

Obviously I am new to this and did not look at fare codes before I bought. It was only in reading the rules that I saw that they specified "class booked" and according to their notes (I was innocent before); they indicated Y not V.

Thanks for any help.