There are lessons in writing to be learned just about everywhere on the Web. Even the Yahoo! front page is instructive on a number of issues. If you read yahoo.com you can learn a lot — mostly what not to do.
If you saw this, you might think that under way is two words. And you’d be right, at least according to the American Heritage Dictionary:
What if you also saw it spelled as one word?
That’s also correct because underway is an acceptable, but not preferred, spelling.
The lesson for you? If you want to present a consistent face to your readers, pick one dictionary as your spelling authority and always use the preferred spelling.