You have fragments (leftovers) beyond the end of the Timeline content that you intended.
I am going from an Elements Windows workspace, so please translate into Mac accordingly.
Expand your Timeline content to the maximum with the Zoom Out Zoom In slider above the Timeline.
Press the End key of the computer keyboard. That should take the Timeline Indicator to the fragments which must be deleted.
Explore all the tracks in that area.
Repeat the End key press until the Timeline Indicator stops at the end of the intended Timeline and not some 3 hours afterward.
What you find at "end of track" could be fragments or files that you moved out of the way of the active project and forgot were there.
The fragments typically present as thin vertical black lines scattered about the tracks.
Please let us know the outcome.
Thank you. I thought I did get rid of any remnants, but I did find 2 more that didn't show up at all. I don't have an end key on my laptop, so I right-clicked at the end of each track and it would give me the "Delete and Close Gap" if there was something there. Then if I zoomed in at the end of it, I could find the little piece of nothing. It worked! Thanks again!
Great, wonderful news. Glad that worked for you.
Thanks for the follow up which will be helpful to all who find themselves in a situation such as the one you were facing.
I had the same problem... And this thread was very helpful in solving the problem for me as well.
Many thanks for reporting the outcome for your Timeline issue.
Follow up information such as this is very important and is appreciated by all.
Please never hesitate to ask if you have questions or need clarification on your
Premiere Elements workflows.