The Dutch pair have both joined Brighton this season from PSV Eindhoven.
Propper said, “Normally he plays left side a little but he comes in a lot to get beyond the striker.
“At the moment he has been playing as a striker."
Schelotto told The Argus: “We exchanged shirts after the game.
“Caballero is a good goalkeeper and he is Argentinean, like me.
“He complimented me a lot and I was happy with how I played.
“When you do things and the opposing team come and congratulate you, that is nice.
“I'm pleased about that on a personal level but I feel bitter about the result."