The description of "Welcome and General Discussion" includes:
This is also an area to have general discussions about random topics that don't fit elsewhere.
Some are taking that differently than others. I'm sorry that it is inconvenient for you to wade through what you see as incorrectly categorized threads. You can try flagging them to be moved and/or volunteering to be a mod. From the outside, it looks like the mods have been pretty busy lately stamping out abusive speech and company shills.
Maybe you could suggest that the description of the category be changed to specify "...about random
financial/frugality topics..."