Creating a mesh body, Neck seam does not line up?

[Altier Verwood]

Hello there, I will try to give as much information as I can, but even I'm confused as to what to ask.
I am trying to create a mesh body, and I am using avastar for the rigging. i have a default mesh head as the template, and everything lines up in blender, I made sure to check weights and all that too. 
but when uploading to SL the neck seam shinks in. like the picture below. I tried messing with the shape and nothing seems to fix it, I've been trying for several hours now I'm totally lost on what else to do. Any help would be greatly appreciated, this is stopped my whole project.

https://gyazo.com/b293a26db2fe8d42fd0261ded7a158f9
https://gyazo.com/8141c8ffc583bb22deebc18195cfe293

[Altier Verwood]

So i just figured it out but I'm not sure, how, basically I will try to elaborate best I can. the default ruth's neck is wrong, it has scales applied to it that make it not default any more. 
and when you load the avastar one in it has scales, you must click "neutral" shape, 
the default SL neck is FAT like really thick, and that was the problem.