I would look at the cr2 for the clothing and make sure there isnt a value in the setting for abdomen and chest thats putting it off at the start. It looks like some of your pokethrough might go away if the gown was straight. 

You should also use the magnetize pose so that the built in magnets will affect the clothing for V4. If you dont you wont get quite the same morph. 

I would suggest you post to PhilC for help as well.