Forms Data Controls :: Hidden Cells Become Visible When PageIndexChanging Fired?

I am having an issue with hidden cells when a PageIndexChanging event is fired in a gridview.

On the page_load I am setting the visibility of an edit button in a cell of a gridview to true or false depending on a users credentials.

Everything works as intended when the page is first loaded. When I click to a different page index the edit button is visible in all cells when it shouldn't be. The edit button is then visible in all cells even if I navigate back to the first page.

Here is the pageindexchanging event:

protected void GridView_EmployeeList_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GridView_EmployeeList.PageIndex = e.NewPageIndex;
GridView_EmployeeList.DataBind();
}

Here is some code from the page_load:

protected void Page_Load(object sender, EventArgs e)
{
foreach (GridViewRow row in GridView_EmployeeList.Rows)
{
If(row.Cells[1] == "Manager")
{
row.Cells[13].Visible = true;
}
else
{
row.Cells[13].Visible = false;
}
}
}