Try to avoid using apostrophes or dashes so you don't get cut off. Either you're copy/pasting from another program or site, or you're using a browser that has foreign punctuation that the forum can't read. In the news section at the top, it says:
The forum software doesn't like foreign apostrophes, and will sometimes cut off your posts if you use them. This can happen by copy/pasting from other formats, or by using a smartphone. If you are having problems, avoid use of symbols, like apostrophes, quotations, or dashes, and that should solve the problem. It's a UTF-8 coding issue that we don't know how to resolve yet.