did you treat your muslin before putting the freezer paper on it. bubble jet set helps your photos do well and stay soft. bubble jet set rinse too.
long ago i did a memory quilt and took fabric sqs and photos to a print shop. they ironed on the photos for me to my fabric sqs. but since i didn't know about the fabric needing to be treated first, the photos are sort of stiffish. like on a t-shirt.