used here:
laced up dress
strings and tails
depending on the pose you are using it can happen that the tie/strap can clip through one of the rivets/rings. to fix it click on the the strap that is clipping, find the corresponding hole where the strap is attached to, then move the internal line around to fix the clipping issue.
if you want to tighten up the dress and create a bigger gap in the middle. select all top patterns. then in the property editor, decrease the "shrinkage weft (%)" value.