There could be a few reasons. First, if the skillet was overcrowded it could have cause the temperature to decrease, leading to soggy instead of crispy chicken. Second, if the chicken sat on a plate or sheet pan for awhile it might have accumulated steam on the bottom and gotten soggy. I like to keep mine on a cooling rack until I serve them to prevent that. Last, if they just were not cooked enough in the skillet they will be soggy.