I use the word CNA on a regular basis. It is the name of an insurance company. Everytime I type CNA it changes to CAN. Normally I type CNA and when it changes to CAN I hit the undo arrow and it changes back to CNA. It works but it is a real pain in the B__T. If by chance the sentence ends with CNA and a period CNA. I can't undo it.

So far when spell check challanges CNA I have clicked on ADD to the dictionary. It didn't help. A long time ago I manually found the dictionary and manually edited the file and added CNA and also cna. Nothing helped. Anybody here have the info to solve.
Thanks,
John