[OSM-newbies] Confused: JOSM upload compared to GPX upload

[Daniel Page]

Hi everyone,
A few questions regarding JOSM's upload feature.

If I have this correctly, JOSM allows a user to import a GPX file, set 
up what needs to be set up, (ref, highway, name...), and directly 
syncrhonise with OSM, otherwise you can manually upload a GPX file to 
the server, then use Potlatch to process. Am I right?

Unless I am missing somthing, a JOSM user cannot see anywhere on the 
site where his submitted work is (except to open potlatch and see what 
ways are rendered), but manual GPX uploaders can directly see what has 
been done on their login page. When I look at my member page on OSM, it 
looks as if I have never done anything for the project, even though I'm 
an active JOSM user, and this could be true of the members 
geographically close to me... No way to tell! Is there an easier way of 
seeing the activity of JOSM users on the site?

Finally, I can export GPX data from JOSM, except my zone contains half 
of Paris and associated suburbs (2 mb file) and not just the ways I have 
been working on. 2 questions: 1) is it useful to do a JOSM upload and 
also a GPX export, and 2) if so is there a way to "crack out" my 
added/modified data and leave the rest?

Cheers,
Daniel