Some of the furniture I can't modify to turn it phantom, but I will try that on the default prims I set up and see if I get any results with those.
All my cats just went to sleep a few moments ago. Y_Y So I will update when I can test it next.
Thank you for the suggestion.
I hope my furniture isn't kitty proof. x_x
Update:
The phantom thing helped, and I saw them start to jump on the ones with phantom prims under. When they do jump, they are usually pretty off and become floating kitties. I guess they only like phantom furniture as well, so it means pretty much all of my current furniture can't be used because it's not modify. So I guess it is indeed kitty proof, but will keep it there a while just in case they change their minds and start using it. Just happy I got to see it work a few times.
I will keep trying to get it working better with some different furniture and hope it gets updated in the future. ^-^
Thank you for the help and the replies. <3