how to set up this terminal block

I am trying to create and use a terminal block like the one shown here:

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In this case, it has three columns of 7 connections which are internally jumpered, i.e. A-G are on the same circuit. Sounds simple enough so far. So, I made this manufacturer's part:

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When I associate this part with a terminal block symbol in my line diagram, I can then attach wires to the terminals I need easily.

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the problem comes when I go into a schematic. I can draw a wire, from pin 1 on connector P1004B, stop it, then drop a terminal on it and it picks up terminal "A" as I would expect. However when I draw the subsequent wires from the other connects and drop terminals on them, they either want to create a new terminal (X2), or they pick up the wrong terminals from my defined part.

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Can someone tell me how to get this working right?

or is SWE unable to perform this simple task? If that is so I don't think my company is going to spend 6 grand a seat for something we have to kludge.

On a related note, I am not even totally sure if I implemented this correctly. The work flow for making a terminal block seems different than for other parts. For example, I had no problem defining our custom connectors (as a manufacturers part) and then inserting them via the dynamic connector tool. This then creates a component in the component tree which I can then reference or make instances of. similarly, if I drop a terminal strip symbol on my line diagram I can then associate it with my manufactures part and it creates a terminal block component in the tree. However if I open that with the terminal strip editor its empty! Why does the symbol properties in the line diagram show my parts terminals but the terminal block editor show nothing?

what I have to do at this point, in the terminal block editor, is add a new terminal to the block then select that terminal and associate it with my part. So my custom part apparently is associated twice. What is the correct procedure for creating a terminal strip? Is the line diagram symbol and the component in the tree both individually associated with the same part?