When I'm using my iPad to compse posts in the forum, I notice strange things also. My biggest beef is the lack of immediate 'Upeercase' first letter of a new sentence a/o paragraph. Most apps and webpages I veiw work as I'm expecting, but not this one.
"Weird text encoding"?
Public uses the most basic of the basic
(plus of course the obvious fact noone else has ever suggested this bug in nearly 4 years of posting strongly implies error is on OPs phone)
I am a programmer, and my best guess is that it's something on PM's site's end. It almost sounds like they are using a weird text encoding, or otherwise their forum app that is running to host all this has a weird bug when multiple characters are being changed/added at once.