Hey There. When you are quoting something there are little commands that appear in the txt box around the text that you are quoting. I don't think I can type them in without them being executed. So...

(quote) at the start of the text and at the end of the txt (/quote)
except with square brackets instead of curved.

Any txt that you type in between the 'quote' and 'unquote' commands will appear in a single quoting box.

If you don't want the txt to appear in a quoting box then you will need to find the commands and delete them. Othersise you could insert the commands around the chunks you want. E.g.,

(quote) the person (/endquote)
my response
(quote) some more of what the person things (/endquote)

Or...

You could find something else to distinguish your response from theirs like:

> theirs
mine

or
****theirs
mine

or whatever...