Here's some pics - I want to make sure that I am describing the situation correctly. I think I need to get a pic of what's going on in the corner GFCI's box. What is a "jiffy box"?
Thanks.
A "jiffy box" is the style of box depicted in the switch reconfiguration and the one in the new photos containing the 2 GFCI's.
The wall material is cut the size of the box, the conductors inserted into the box, the assembly inserted into the wall and two clamps are tightened to hold the box against the top and bottom retaining tabs encircling the screw tangs for retaining the device inserted in the box.
I prefer to do a wall patch and use a standard box than fiddle around in a tight, marginal quality installation.
Regarding the 3 duplex recep. you are dealing with; The general method of installation is as Neal described.
OR, if the 2nd duplex GFCI recep. is feed from the load side of the first, to its line side, move the connection from the load side if the first, up to the line side, of the first, at the 2nd, if the 3rd is fed from the load side of the 2nd, move the conductors from the load side of the 2nd up to the line terminals and you will have three independently acting GFCI"S.
Also, keep in mind, GFCI:s wear out.
This is expanding, quickly, to some potato salad, to accompany the ham sanwich.