Thank you for your speedy reply. I am somewhat calm about it all. I finally realized how I have to remake all the SP easy (haha) galleries from what I have now, and I feel better about that. I knew it was easy but was so bent out of shape about the layout confusion that I couldn't figure everything out at once. It will probably only take a few days.
First of all, I didn't modify the template code or anything myself or on purpose, however, that template (on my live site at mainefiberarts.org) has been broken in some way for a few years, ever since Joomla Bamboo was taken over by Joomlart who couldn't fix the template. Any time I tried to make changes the whole site went down front and back, and I had to roll back the entire site to an earlier day to get it back. I thought it was time to get a new template and migrate at the same time. So I started this process by creating a staging site to test it on and getting your Camera template (even though I'd like to use the other one, Ufolio).
I have already installed the Camera template components modules plugins and everything on my staging site (my live site is still working as well as it has been).The duplicate business and the mess you see must be caused by the "StageIt" component that creates a copy of the real site in a folder and lets you fiddle with that and gradually update the live site. You can see the live site if you take off the "/stageit" at the end of the link. It looks fine but it is not.
My real goal is to be able to migrate/update to Joomla 4 anyway. I thought it would be easier to install a working template on the current site that is compatible with 3 and 4, so that once everything was working on Jooomla 3 I could zoom right into Joomla 4. I first tried the migration on my staging site but it was, oh, so awful I went back to the original site and erased the StageIt version altogether, then created another one I've been fiddling with.
It makes me very nervous using that "StageIt" plugin/component/whatever it is, because you are right, it has created a monster mess for me to figure out, partly because there is so much of the older template still taking over, all my categories and articles and modules that I don't even use anymore and thousands of images all want to stay where they are and use the old module positions and the old plugins that made the modules (or modules that made the plugins work).
I have considered starting over with a fresh site with the prebuilt template installed and importing the content I want into the new site, just to get rid of so much of the historical stuff that I don't need, but I'm worried about starting over with the "HotSpots" map component I need to use because it is so intricate and it depends on K2 which is not, to my knowledge, going to work on Jooma 4, even though the Hotspots is Joomla 4 compatible. And I don't really understand how hard or easy it will be to get the database stuff over to the new site.
I guess my question is, given that whatever I do is going to be very involved and tedious, if I'm going to start over, shouldn't I start over with Joomla 4 with a QuickStart package of the J4 template I want? And if I do that, can I still export/import files and data from the Joomla 3 site? In other words, which is easier, exporting then importing pages from a QuickStart blank-ish site into a huge mess (like I have now), or exporting then importing data into a fresh site that has the changes to layout etc. already made?
Thinking,
Carol