Hi Jerry,
Welcome back!
That snippet shared with you in our previous thread was written to reverse the chronological order of Past Events only, and it is working as expected as I can see from here.
I would suggest you to check your theme’s functions.php file and look for any additional custom code that might be causing this issue. Also, can you please send us a screenshot from the page where you are seeing your Upcoming events in reverse chronological order while having this snippet enabled in functions.php file?
I’m curious to know why this is happening since that snippet is using the tribe_is_past function as a validation to reverse the chronological order.
Thanks!
Patricia