I have modeled alot of clothes for V3 and have come across this minor error, Try first to export you character figure as an obj (with no world transformations) then re-import and see if the clothing still is in the correct position when that is also imported (probably will also look like the poke through), the reason for this is that the figure wasn't Zero'd when you based your costume apon it. Try zeroing the figure and loading the clothing as an obj then moving the clothing to the correct position, and save the obj, (preferably under another name and alter a copy of the cr2 for this clothing so that you have a backup), then retry the newer obj (cr2)

Getting old and still making "art" without soiling myself, now that's success.