Getting EXT error in CFGrid using a valuelist in a cfgridcolumn

I can see my valuelist choices when I click on the gridcolumn in my CFGrid.

But I am also seeing a weird choice added to the valuelist choices. It is some kind of Ext error I believe.

The valuelist named "PositionChoice" should display "Include" and "Remove"

The weird choice in the valuelist options begins with: <div class=x-grid-col-0

I initialize the valuelist like this:

<cfset PositionQuery = QueryNew("IncludeORNot", "VarChar")>

<cfset newRow = QueryAddRow(PositionQuery, 2)>

<cfset temp = QuerySetCell(PositionQuery, "IncludeORNot", "Include", 1)>

<cfset temp = QuerySetCell(PositionQuery, "IncludeORNot", "Remove", 2)>

<cfset PositionChoices = #ValueList(PositionQuery.IncludeORNot,",")# />

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I call my valuelist in the CFGrid like this:

I am developing this on my CF8 dev box.

Have you experienced this weirdness? Any solutions or insights? Thanks!