ChangeBasis has me stumped

I'm trying to orient a list of points from one coordinate system to another. 

There are 7 points and 7 planes. I just want to take the first 6 points and orient them from the first 6 planes to the last 6 planes.

point(0) oriented from plane(0) to plane(1)

point(1) oriented from plane(1) to plane(2)

etc.

Unfortunately changeBasis is giving me some trouble. I'm sure I'm doing something wrong. See script below (some of the script is just there for me to verify that the inputs are exactly the same between the component version and the scripted version. I've grayed this stuff out). The bottom panels in the screenshot show that there are differing result between the two operations.

Private Sub RunScript(ByVal Plns As DataTree(Of Plane), ByVal Pts As List(Of Point3d), ByVal adj As List(Of Double), ByRef Orient As Object, ByRef A As Object, ByRef B As Object, ByRef C As Object)

Dim orientPts As New List(Of Point3d)

Dim plnList1 As New List(Of Plane)
Dim plnList2 As New List(Of Plane)
Dim ptList As New list(Of point3d)

For i As Integer = 0 To Pts.count - 2
plnList1.add(Plns.Branch(1).item(i))
plnList2.add(Plns.Branch(1).item(i + 1))
ptList.add(Pts(i))

Dim newPt As Point3d = Pts(i)
newPt.transform(transform.ChangeBasis(plnList1(i), plnList2(i)))
orientPts.add(newPt)

Next

Orient = orientPts

'Just to show these input are the same as the GH version
A = ptList
B = plnList1
C = plnList2

End Sub