Keyword problems when editing with CS6

Question

In LR 4.2 and 4.3, when I edit with photoshop and use lightroom corrections, LR creates a new file.  I edit it in CS6 and save and close.  Back in LR, the file is there, the proper keywords are highlighted and there, but LR cannot find that file.  In other words, LR does not recognize the photoshop keywords. 
I am using Win 7 64.  My catalog has less than 1,000 images.  My master catalog has 25,000 with the same problem. 
As I understand it, when you edit in Photoshop with LR corrections, LR creates a new file and PS takes in.  PS sends info to LR when it is done.  If I edit a photo selected with a keyword and I can only see that image, when I get back to LR the screen is grey and no image is found.  I can find the photo in the folder.
My workaround is to delete the keyword and reenter.  In a small database with few keywords, clunky.  In the real world, very difficult.

Answer 1

I have been using lightroom since verison 1 (actually I owned the precursor, I forget the name).
Step by step
1.  Select image.  Add unique keyword.  enter.  Keyword is now in the keyword box and highlighted in recent keywords.
2.  click on keyword to select all images with that keyword.  Highlist the test image.
2.  Right click the image.select "edit in ..."  "Edit it in CS6..."  Then "Edit a copy with lightroom adjustments"    (edit a copy- same issue)
3.  CS6 opens and the file selected is open.  Convert to B&W (anything).  Control -s to save.  Control - w to close.
4.  Goto lightrooom..  New edited image in the folder, but invisible to keyword.  The number of images associated with that keyword gets larger by one. 
In my system, the key step is step 2.  If I add a keyword and edit from the folder everything is fine.  If I have selected or filtered by keywords, the edited image does not index for that keyword.
Is this me?  I guess my workaround now would be to edit images from the folder view/