VBA SeriesCollection resets premade template's data series format

[pltom55]

I have a premade chart (template) with very thin markers to make the data more aesthetic.
I'm trying to import data into my premade chart but only the first data series holds on to the thin markers. All the others are set to default. Code is attached.

I suspect that SetSourceData is setting the data which is why the first data series works as intended, but SeriesCollection(2) is overwriting my (premade) series 2. Has anyone ran into something like this?
Thanks in advance,
Tom

---

Sub Silver()
Dim n As Integer
Sheets(3).Activate
Range("D1").Formula = "=count(B:B)"
Range("I1").Formula = "=count(G:G)"
Range("N1").Formula = "=count(L:L)"

n = Range("D1").Value
 

   
    ActiveSheet.Shapes.AddChart2(240, xlXYScatterLines).Select   'Add Chart
    ActiveChart.ApplyChartTemplate ("C:\Users\tweglarz\AppData\Roaming\Microsoft\Templates\Charts\Reflections Chart.crtx")
    ActiveChart.SetSourceData Source:=Range("B6:B" & n, "C6:C" & n)
    
n = Range("I1").Value
        
    ActiveChart.SeriesCollection.NewSeries
    ActiveChart.SeriesCollection(2).XValues = Range("g6:g" & n)   ' Source X data
    ActiveChart.SeriesCollection(2).Values = Range("h6:h" & n)
    
n = Range("N1").Value
        
    ActiveChart.SeriesCollection.NewSeries
    ActiveChart.SeriesCollection(3).XValues = Range("l6:l" & n)  ' Source Y data
    ActiveChart.SeriesCollection(3).Values = Range("m6:m" & n)
   

    
    
End Sub