Spell Check

I am checking a work email, mostly because I have trouble spelling "acknowledgment" [in fact, I just spelled it wrong three times right this minute]. However, what spell check is upset by is "but many of you have--thanks." Have--thanks is just too much for it to accept. It offers these alternatives:

harvestman
haven't
handstands
hardstands
havens


Raise your hand if you knew that "harvestman" was a word. Okay, so there are three of you. Fine. How about "hardstands?" Right. That's what I thought. Nobody. Thanks, Microsoft.