How Come?

Perhaps one of our more refined and educated bloggers can answer me this.

How come the Blogger program doesn't accept Blogging, blog or blogger as a word when you run a spell check on your work? It would seem to me that blog and blogging would have been included in the data base, but hey I type in blog, blogger or blogging and I get offered a number of options including one of a flogging.

Which on some days is akin to how I feel about my blogging endeavors but I digress.

Anyways, someone with an answer please share with the group.