From what I see, the apostrophes or hyphens or other punctuation is written in ANSI text form, like in Windows Notepad, everything is OK. But if print from a fancy-fonted blog is imported into Notepad, it doesn't change the left and right quotations -- single or double -- or question marks or em-dashes into ANSI. Then FR's html converter gives it another interpretation like you say.
What the poster has to do is:
(1) DON'T use a word processor with fancy fonts to paste texting into the FR comment entry box or post editor
(2) DO go through any stuff that you've pasted and convert the non-alphanumeric characters to ANSI by overwriting them by typing them in again using what the FR text editor supplies.
That's what I think I've seen and had to do here.
The fact people have to do those things is a joke. Ancient old ass software that somehow require 80k a quarter is such a scam