Help with Mesh for Shoes

Hello I am new at this.  I added knee-highs to the nightie with the garters.   I just did not like to use it. That is what the garters are for right??  But I not that good with blender and I do not now how to fix the shoe issue.  if you have shoes on your sims the knee-highs stockings are on top of the shoe. I think its a mesh thing but I am a noob.  Can someone please help me? I am not sure how to add the image.  I can not paste it.  Thank you.