Welcome to Wikitree, Don!
Are you still having trouble adding your grandfather? If you are, post the Wikitree ID so we can try and figure out the issue.
When you reply to a comment, be sure you use the reply link so that the other person will be notified. When you post a new comment on your own profile, no one is notified.
There are a few things to learn here but soon you will be up to speed. Come back here to the forum if you have any questions. You will find that Wikitree members love to help.
Great to have you aboard!