Ok, here's the weird part. When I did my first reforge, I made an item that had 150 luck on it. I wasn't really paying attention because it was all new to me and I just wanted to fiddle with it for a bit. Then, later when I was actually wanting to make a piece with luck on it, the runic kit won't let me. So, after posting here, I decided to try using a spined kit instead of the barbed kit. Testing it, I was able to get that screen to allow me to click on the auspicious one for luck. BUT, when I went to try it again, it's just like the barbed kit and the horned kit. Won't let me. I did the same exact thing on the second test try and now it doesn't let me have the option to click on the auspicious luck thing.
