Minor yet Supper annoyance

I know it is not a big deal to many but I have been going crazy over it the last few days.
I know of removing doubles which eliminates the seam issues when combining meshes but now I find myself in new struggles as I am doing releases for the BDM body and the Transsexual bdm body I find myself stuck with a major flaw and imperfection that will probably result in me having to redo both the Transsexual BDM and bdm female before I can release the requested conversion. It started becoming noticed as I started playing and it seems the issue resides with the lower body particularly.

 This is the parts when separated see that seam?

 When together it is perfect Please note: this is unglossed but does not make a difference

 This is when they are together

But once you separate them this is what happens...

This is a minor issue for the most part but since I am still not "pro" at blender I still find it to be a major problem and halts me officially releasing the ANB bikini for the BDM body type. I will have more work to do it seems. The work is almost never done :(.  

Also I am working on a Spider Armor but I will keep the concept art under wraps until the actual 3D model is made :). 

But for now I can't do anything else until finish this project it is a relatively easy task just a matter of me learning about the mesh combines and seperations >< 

Well looks like it's back to work for me X_X

BTW soon I might be renaming the BDM For Transsexuals because I am in process of recutting it and redoing it myself since to avoid issues for permissions. The BDM body is nice and lovely and is technically a combination of two Speedbusters bodies, I will re combine them so the associations for the transsexual body avoids any potential conflicts and renaming it would only make sense. But this will be done after the issue of the dreaded bad cut is resolved.  Keep your eyese peeled for the renaming of the body relatively soon. Also a teaser of whats coming on completion of the issues (it is shared with the female issue).

Note: The official version will include a variant of the penis as well as a more realistic version of the droop down of the material (I personally prefer this variant since I am more for skimpy and sexy as opposed to skimpy and nothing)