"greater than" is only a usage in mathematically expressions for a ">" symbol. There are many proper names for the symbol but the mathematical usage or meaning does not apply here.
Some Usenet browsers have evolved to more advanced levels and support the style, quite well. Your style is only one of the many used on Usenet and other forums.
My Usenet browser can read and write posts on Usenet. Are you using a separate newswriter to post?
I see no confusion. All text is with the respective headers containing the reference, who posted it and sometimes the time and other details, depending on the browser used.
I use a newsreader for Usenet. Mine adds a greater than symbol to lines being quoted, even if they already have greater than symbols due to being previously quoted. Newsreaders do this because Usenet culture expects them to. Your software apparently not intended to be a newsreader apparently refuses to add one to a line already having these, even if you are adding a level of quotation. Missing greater than symbols can confuse readers as to who wrote what.
In article , Josepi wrote: The symbol you are refering to is probably a right caret. Your browser has added them