[AtlUmpSteve]

The best explanation I have been given to this question came from the Deputy National Director of Umpire HP. He said (at that time, probably 20 or more years ago) it was listed as an appeal because the player is asking for a ruling if the runner is protected as simply overrunning first base, or if in jeopardy because the umpire judges a move toward second that removes that protection.

And, like the other items listed as an appeal, if they don't ask, we don't tell them or indicate in any way that the runner is in jeopardy. We wouldn't rule on the runner being routinely tagged on a return to first base after missing the base, unless appealed, right? In the same way, we don't rule on this, either, unless appealed.