No, I'm not concerned about the blank icon (though I will follow the instructions in that thread to get rid of it)
The issue is that above the blank icon, I see Control Panel items in alphabetical order from A => N.
After the blank icon, the Control Panel items restart back at the letter D, and then go through the rest of the items alphabetized D => Z.
Update (about a minute later): After I deleted the blank icon by following the instructions in your recommended thread (here), the blank icon had disappeared AND the sort order of the Control Panel items was also fixed. Thanks!
AzJazz1