The one thing that comes to mind after reading your posts is...you need to talk to your surgeon about these issues. There is no way that any of us can possibly know what is going on with you.
I'm not sure anyone else has ever posted on this forum with a complete take-down. There've been lots of re-dos, but no un-dos. I feel badly that I can't offer more help to you. I still stand by the opinion that swelling is a big part of what's going on, but that is only an eduated guess based on my own experience recovering from a Nissen.
I do think you need to discuss these problems in detail with your surgeon, GI doc, PCP or surgeon's nurse practitioner/PA (these medical professionals usually have more time and can spend the time needed to go into detail with you.)
Good luck! Hope you feel relief soon.