Personally, I think it's a matter of decision making. I often feel that way too. Sometimes you can cross-post. That is perfectly fine. I think more people will see the work that way, and maybe you can get more feedback (don't be shy about that). I think it's good for us. Ya know?
Like, sometimes I have a work in progress that might be a landscape (though it could also be an abstract too--what to do?), but it's done in watercolor, so I'll post it in Watercolor until it's finished. Then I'll have to figure out where to post it in the Style & Genre. A conundrum, but there needs to be something for everyone. Everyone wants more. Some people want less. Can't make everyone happy, but you have to try and do your best. That's all we're trying to do.