VS 2010 DataGrid - Row Contains Textboxes But Should Be Labels

I have a datagrid on my aspx page (it is actually a user control on an aspx page). I dont ever want this datagrid to be editable. There is an Edit and a Delete link in the last column, so if you want to edit the data that are in the row you go to a new page for that purpose.

Let's say I have four rows in the grid. If I use the Delete link to delete the third row, when the page refreshes and the grid is rebuilt, the last row contains textboxes. I do not understand why this is happening. I was not the original author of this code (disclaimer).

This is the datagrid code on the ascx page:

Code:
<!-- PRINTER GRID -->
<asp:Panel ID="ShowListPanel" runat="server" Visible="true" CssClass="aspPanel">
<asp:Button ID="AddNewPrinter" runat="server" Text="Add New" />
<h1>My Printers</h1>
<asp:DataGrid ID="PrinterList"

[Code] ....

When I bind this grid to a dataset, what would be happening to create the last row with textboxes?

Code:
Sub BuildPrinterGrid()
Dim UserID As String = SFTools.FindUserID()
Dim outputDS As New DataSet
outputDS = SQLCalls.GetPrinterList(UserID)
PrinterList.DataSource = outputDS

[Code] ....

Note that there are two procedures that handle PrinterList.ItemDataBound. Is that unusual? I don't know if this is something obvious that I just am not seeing, or something lurking underneath seemingly correct code, but I don't understand how the textboxes are getting created.