You can't bookmark a shape object. You might bookmark its anchor but, better still, if you name the shape, you can use the name for future reference.
Code:
Sub TITLE()
Application.ScreenUpdating = False
Dim Shp As Shape
With ActiveDocument.Sections(1)
With .PageSetup
.DifferentFirstPageHeaderFooter = True
.TopMargin = CentimetersToPoints(5)
End With
Set Shp = .Headers(wdHeaderFooterFirstPage).Shapes.AddPicture _
(FileName:="Z:\Logo1.jpg", LinkToFile:=False, SaveWithDocument:=True)
With Shp
.Height = CentimetersToPoints(4.94)
.Width = CentimetersToPoints(3.58)
.LockAspectRatio = True
.Left = CentimetersToPoints(13.67)
.Top = CentimetersToPoints(-1.23)
.WrapFormat.AllowOverlap = True
.WrapFormat.Side = wdWrapNone
.Name = "Logo1"
End With
Set Shp = .Headers(wdHeaderFooterFirstPage).Shapes.AddPicture _
(FileName:="Z:\Logo2.jpg", LinkToFile:=False, SaveWithDocument:=True)
With Shp
.Height = CentimetersToPoints(4.29)
.Width = CentimetersToPoints(4.84)
.LockAspectRatio = True
.Left = CentimetersToPoints(7.83)
.Top = CentimetersToPoints(-0.27)
.WrapFormat.AllowOverlap = True
.WrapFormat.Side = wdWrapNone
.Name = "Logo2"
End With
End With
Set Shp = Nothing
Application.ScreenUpdating = True
End Sub
PS: When posting code, please use the code tags, indicated by the # button on the posting menu. Without them, your code loses much of whatever structure it had.