Before jumping the gun on anything, yes, I have looked at this Q/A already.
I've recently discovered the Twitter user '@Glitchr_', and have been looking through some of his tweets and some of the "art" he makes. Something that caught my eye as I was scrolling down the page were these two things:
Now, you may think, wow, backwards text. The title must be formatted like that. But if you look into the HTML, here's what you find (Highlighted Text):
The second thing I found was this:
Some of the zalgo text also messed up the dates and somehow reversed it as shown.
So as stated in the title, What causes Zalgo text to do this?