When I am in mobile view and click the "Check threads you've posted in" link it just shows me a URL like:
http://www.bluelight.ru/vb/search.php?searchid=671168 (not sure how helpful that is to you?)
which - in Mobile view - comes up with a list of all threads I have posted in,
in the order that they have been most recently posted in by anyone. Interestingly, the order of the list is not updated unless I log out and log back in, (even if i click on the link again, it will say "Generated 27 mins ago" if I logged into BL 27 mins earlier).
And if I go to my profile and click "Find latest posts" it also gives me a list of all the threads I posted in, in order of when
I last posted in them, so it does not serve the same function and is not as helpful.
For the URLs you posted:
I tried
http://www.bluelight.ru/vb/search.php?searchuser=Swimmingdancer&starteronly=0 and it gives me the regular search screen with my name pre-filled-in in the username field. When I click "Search now" it gives me a list of all
threads I have started, in the order in which I started them. For example,
http://www.bluelight.ru/vb/search.php?searchid=671244 (again, I don't know if you see the same thing I do when you go to that URL, but I figured I'd include it).
The same URL with a 1 at the end gives me the same results.
But are you saying those links should just give me the same info as "find latest posts" and "find latest started threads"? It would be really nice to have a feature like the "Check threads you've posted in" one from the mobile version of the site in the regular version. I guess what I can do for now is switch to mobile view to do it

- until now I didn't even realize that I could switch to mobile view while on my computer, I assumed I could only do it on my phone.
ETA: So now when I go to "Advanced Search" it gives me the url
http://www.bluelight.ru/vb/search.php?search_type=1 and when type in my username in the username field, and select "find latest posts by user" and "show results by threads" it gives me a list of threads I've posted in in the order in which I posted in them (still not what I'm looking for), but for some reason it isn't showing this thread at all, or the one I posted in the Testing forum. If I select "show results by posts" it does the same thing but just shows the posts and not threads but it
does show my posts from this thread and the Testing forum. If I use the URLs you posted it still doesn't work properly. And I still can't find any way to show the threads in order of most recent post by
anyone, aside from the mobile view.