Can't thread table in InDesign

I have a table in InDesign which I created in a frame. I struggled to thread the table into another frame but somehow managed to do it though I don’t know how - it was a nightmare. Threading works fine through these two frames but now I want to extend to a further frame. I have tried every which-way and it just won’t work - similar to when I first tried to link the first frame to the second. When I try to add rows at the bottom of the table I don’t get an overset text indicator, the new rows appear OVER THE TOP of the existing table. By enlarging the frame widthways the new rows then space out to the side within the enlarged frame which is not what I want.

I have tried creating a new frame first and then linking the frames by clicking the out point of the first frame to load content and then placing into the new frame. This links the frames but does not load any of the table or text.

If I load the content and then just place on the blank page a new linked frame is created but again no table or text within it.

Is the fact that I don’t see an overset text indicator a key to the issue?  What am I doing wrong? I have been trying to resolve this for a couple of months with no success.

Screens attached.