Graph is not appearing in correct frame?

[garynewport]

I am unsure if this is a Python, (custom)tkinter or matplotlib question; though the common ground is Python.

I am creating an app to display a range of graphs based upon some data.

I am using customtkinter as my GUI development system.

I have my main window with two frames; graph_select_frame and graph_frame; the former for a set of radio buttons and the latter to display the selected graph.

Currently, I have the radio buttons working and the graph_frame appears. All I am trying to get is the graph_frame to display a single graph (independent of any selection made).

I have attached my three files relating to the system so far; based upon what I can glean from the online documentation.

The problem is that the graph is appearing in (over the top of) the selection frame and not inside the graph_frame.

How do I make the matplotlib frame a child of the graph_frame and not, as it appears, a child of the main window?