Master Detail page only returns first record

I used the Master-Detail Relationship with App Connect tutorial:

However, my finished product will only return the first record on my detail page (regardless of whether I click the first record or 15th record). Detail of first record remains on page after every subsequent click.

My link is on the “ID” variable.

Screen Shot 2019-07-06 at 1.03.51 PM.png1568×987 70.6 KB

Here’s what my live view currently looks like:

Screen Shot 2019-07-06 at 1.06.38 PM.png4330×2543 722 KB

And here’s my code:

Screen Shot 2019-07-06 at 1.13.29 PM.png2222×2216 504 KB