[Missing Half Mesh when uploading]

I have rigged a mesh using marvelous designer- and then blender to rig. I have done this successfully before however now these shorts are visible only on one side when upload to SL. Does anyone know a fix- I have applied transforms- rotation and scale. I am at a loss. 

https://gyazo.com/fc41ca10452c5c2984db50819bd4ca1a

https://gyazo.com/e89a0e7a5da85e9b9e87795be618a55f

That is how it looks for reference. 

[Second life message]

Not the case. On either of those. The one I was wearing was added on not rezzed and my friend has never had access.  Its only doing it with some collars. 

[Second life message]

Has anyone received spam email notifications Message from Second life this object has sent you a message- access denied cause you are out of range. My friend is getting these continuously with multiple collars that he has never had access to and is not trying to access. Just wondering how to stop this. Or is it an issue with the collars?