A few observations.....

Why are you using MME? With the focusrite, you should be using ASIO.

Second observation. Yeah I get it that you can slide tracks right and left on the track timeline but the question is why do you need to do that?

The only reason I ever need to slide a track one way or the other is generally a vocal track and it's to create a sort of doubled sound by putting the tracks out of sync by a few milliseconds. So...If you are having to do this to be sure everything is properly synced, you have a problem that should not exist. It goes back most likely, to the choice of the MME driver.

Next observation. You should be using the Focusrite for BOTH the input and the output. Run a pair of powered speakers from the Focusrite. Using the laptop's Realtek sound card could be part of the reason you are having issues. In this music recording thing we do, you really only need to use ONE sound card for both in and out. When you introduce two sound cards, you do not.... let me repeat that... you do not have clock sync between them. That will certainly cause issues with the music not staying in sync properly. Reassign the outputs to the focusrite.... they should be available to you, and with external speakers connected, see if that isn't a better solution for you.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.