F&P Simplus FF Cushions.

I have:
1 Small FF Cushion
2 Large FF Cushions

Seeking to trade for Medium FF Cushions

Beginning six+ months ago I started getting all three sizes of cushions with my new mask/headgear from my DME. I can only use one size, medium. Now I have one extra small (I tried using one of them), and two extraneous large cushions. Is this happening to anyone else? It seems such a waste. If someo...