It's just that not all MBs use the full allotment of 9 standoffs (ATX) or 6 standoffs (mATX), and some folks will mistakenly install all the standoffs w/o looking at the actual number of mtg. holes the board has. As a result, an extra standoff can be behind the board doing damage over time. But if you're satisfied, so be it.
Oh, I did not know that. Thank you for the information! I am sorry if I sounded rude. I will look into it after school!