The various m17n engines were showing up in the ibus engine tab. Since I had no need to use them, I closed the dialog box and removed m17n\* via yum. I then opened up the ibus preferences box and they were still showing on the engines tab. I would have expected the entries to be removed once the engines had been removed. Fortunately switching to SCIM and back to ibus cleared this up.
You need restart ibus or relogin your desktop. And then the new ibus processes will rescan all engines. Actually, it is not a bug. It is a limit.