The slugs are different because the original name of the category was “general” for general questions, and now the name is “Questions & Suggestions”. “general” is still a vlid slug name since it is for general questions and suggestions. I’m happy to hear about the permalink for redirecting old slugs - where do you configure or control that? But even so, I wouldn’t necessarily want to change it from general to questions since that would not cover suggestions.
But ok, no worries anyway, it was just a suggestion, feel free to ignore it if you don’t want to support category references with spaces in them.