P-P shower diverter repair

I was re-assembling after cleaning out the handle of a P-P shower diverter and now have more parts than I know what to do with! Unfortunately, I don't know the names of these parts, but the last one that is still assembled looks to be a rubber washer, so please start there. The next one is a small threaded metal piece (attached to a long plastic piece) that I see no place to thread. ?

Pp

If you were just cleaning out the handle, why did you disassemble the diverter? Your description of the pieces does not correspond to any PP diverter I have seen. A picture would help, although that plastic piece may be the flange holder and packing nut, in which case it screws into the part in the wall after sliding over the stem sticking out of the wall.

As I was tightening (possibly over-tightening?) the clean handle base, I heard a pop, so I began backing the base off, ironically, to see if I had broken anything. Much to my surprise, the handle base had two more parts attached -- a threaded plastic tube (which is still stuck in the handle base), and a threaded metal 'nut' that was on the end of the plastic piece. I tried to re-attach them, but there's no thread showing on the next and much larger 'nut' where the 'rubber washer' is. I started turning the larger nut to see if I could get some threading to show, but thought I'd better check with you first, before I create even more trouble. I have an open house this weekend.

PP shower valves are pretty straighforward, but I am having a hard time with your description.

No photos this week (I blew my USB ports using a new camera). But I looked at some illustrations to use the correct part names for you, and you're right -- I didn't find a diverter valve that looks like this. As near as I can figure, it's some kind of compression valve. I guess it's just the faucet that's P-P. In the interest of time, I did what I was afraid to do and, as I feared, the whole valve started to come out behind the wall, so I screwed that back in, used a wrench on the large nut and pliers on the valve stem and was able to get enough threads inside the large nut to put the packing nut back in. Anyway, it's all back together and it works.... whatever it is.