Typos often make maps look bad. Even if it's just one, if just one person can pick you up on that typo, odds are there's a lot of other people who will pick you up for it. Simple solution is to spellcheck everything.
ESPECIALLY your description. The description is, in reality, how one creates a first impression on the public. If the description is riddled with spelling errors, doesn't explain much about the map or not in English (site rules dictate we use English on the most part), then you won't get as many different people downloading your map as you would if you, persay, fixed any errors on your description. In your case, it's only a few typos, but instantly I felt no interest in dling the map, even with that awesome picture you have for it.
Now, you may say that's 'shallow' and that if you judge a book by its cover you're stupid. If you say that, you would be the stupid one, for what I have told you is fact. Only a handful of people will actually download a map with a poor description (or a poor loading picture, whichever is the issue), but most of those people will be genuine testers who have the feeling the map will be bad, but want to know exactly how bad.
With all that said, if you fix your typos in the description, you will prove to prospective downloaders that your map is, in actual fact, worth downloading.