When I try and shorten it to just "CNN" and put it in my news folder it will just save and close leaving me with a bookmark in the main folder that just says "CN" or "C"

Hi all, been using and loving FF for years but have run into a small glitch in the past year or so. I thought it was a system problem I was having but having recently replaced all of my hardware and reinstalled everything fresh I'm still seeing this. I apologize in advance if this has been covered in numerous other locations, I hunted around for a bit but couldn't find this specific problem. The issue: More often than not, 70% of the time maybe, when I try and bookmark a site using the drop down, before I can finish renaming or choose a folder the window will just close and put the bookmark in the main folder. It's not a big pain just an inconvenience as I then have to open the properties of the mark, make my adjustments and move it manually to the sub folder I want. ie. The default looks like this: CNN - Breaking News, Latest News and Videos When I try and shorten it to just "CNN" and put it in my news folder it will just save and close leaving me with a bookmark in the main folder that just says "CN" or "C" Again, no biggie, just a minor irritant. Any tips or ideas would be great. Thanks all :)