Can anyone tell me what I'm doing wrong in this tutorial exercise? Model A Bracket Mount

First off.. I have never used 3D software.. first time… Trying to learn because I am getting a 3D printer…..
I have 35 years experience working with Illustrator as a graphic designer..
so I was told Shapr3D would be the best option for me to learn with my background..

Anyway, I have done this tutorial… Model a Bracket Mount… from the tutorials inside the app…

I have completed all the steps… but apparently I missed something….

at the end of the video, it says to change the Column Extrusion to 60 mm… in the video when they adjust the column to 60 mm, the bracket moves up with the column when it’s changed to 60 mm…

I am selecting the faces of the column as in the video (the D shaped face)
clicking on the Column Extrusion “layer” in the History panel
I have tried to change the setting in the history panel to 60 as well as using the blue arrow to adjust it to 60 and neither way has worked…

when I adjust mine, only the column adjusts correctly but the bracket stays in it’s original position…

I have joined the bracket pieces with the column and the base using UNION as instructed earlier in the video… When I double click on any part of the design, it selects everything as intended.

So I’m not sure where I went wrong and why the bracket does not move up when the column is made taller…

Any suggestions would be greatly appreciated.

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