YouTube keeps moving - going crazy

[GaryK4]

I have a page with demo YouTube videos and a navigation bar that I created a while ago. Now, I am trying to add one more video (#5). I want all the videos to display in the same location. I make the layer visible and unlock it. Then drag the HTML Placeholder to the desired position, then lock and hide the layer. I repeat this for all 5 layers.
This works for 3 out of 5 layers! When I relocate a layer, another locked layer moves.
Now what?

[steve.ledger]

Please attach the file that shows this behavior.

[GaryK4]

The uploaded file is a working file. To cause the problem, do the following.
On page 3 (demo movies).
First for reference, un-hide each video layer, then re-hide them one by one. They all appear in the same location.
Next Un-lock and un-hide the video 2 layer.
Select the HTML Placeholder and duplicate HTML placeholder (right-click).
At this point (2) of the videos jumper to a new location and there is no way to get them back.
Thus editing the duplicate placeholder won't work.

[steve.ledger]

Disable 'Push' for the HTML placeholder.

To duplicate the placeholder for use on a new layer in the same position, Ctrl+C to copy then use Ctrl+Shift+V to paste in place (same position) on your a new layer.