LTR text behaving like RTL text

I'm attempting to edit a PDF in Acrobat Pro. There are bullets. The moment I make any change to the text, the punctuation flips, as though it's a RTL text.

Before:

After:

All I did was insert a space in the word "reference", and not only did the punctuation reverse direction, but spaces moved.

Here are my Language settings. I've tried every permutation I can think of, but nothing fixes the problem.

Any suggestions?