UPDATE: Ben allowed me to trade in my old remote for a new one. He wanted to research the issues I was having with mine. And, I have, so far, had no issues with the new one. Will update later if anything changes. Shout out to Ben for making the effort!
UPDATE 2: Same issues with this remote. Mainly the volume control, if used sparingly & sporadically over time, no issues. If used to turn the volume up and down several times in a very short time span, say a minute, or minute and a half, the volume will go up when pushing the volume down button. If I wait for maybe 30 seconds, the volume up & down will function normally again.