Yes, two different o-rings are required for the Swinnex 47 mm filter holder (SX0004700). One is for the inlet, which is a cone-shaped component, and the other is for the base, which has a flat surface to hold the filter.
The XX1104707 o-ring seals the filter membrane in place and fits in the groove on the top (inlet) part, while the SX0004701 is the base o-ring and goes on the base (outlet).