Bonus DVD don't show up

I think I have the naming correct but maybe not...anyway, multiple DVD disk sets are not showing up.

Gone With The Wind Special Edition (1954).CD1.mp4
Gone With The Wind Special Edition (1954).CD2.mp4
Gone With The Wind Special Edition (1954).CD3.mp4
Gone With The Wind Special Edition (1954).CD4.mp4

only show up as one disk.