Let’s say this all together: This is utterly, completely, altogether wrong:
The editor in chief for Yahoo! Makers should have referred to this information from the American Heritage Dictionary:
Altogether and all together do not mean the same thing. We use all together to indicate that the members of a group perform or undergo an action collectively: The nations stood all together. The prisoners were herded all together. All together is used only in sentences that can be rephrased so that all and together may be separated by other words: The books lay all together in a heap. All the books lay together in a heap.