I see some (e.g. Cloverfield), but not others (e.g. 10,000 B.C.) as votable movies.

I agree with all this.  Right now, we have to accept or reject the title as submitted - we can't edit it for you.  The only way is for us to resubmit it for you and accept the resubmitted version.  If you want your titles posted promptly (and accurately, so you can find them), please submit in the form the title should be posted in.

So:
1.  Use correct spelling, capitalization, punctuation, etc.  Check imdb.com to make sure.
2.  Put articles ("A", "An", or "The") at the end, preceded by a comma, just like you do when you're alphabetizing anything else.  In an encyclopeida, you find "The Hague," "The Middle Ages," or "The United Nations" under "H", "M", and "U", respectively.  There isn't one huge volume for everything whose name commonly begins with "The".  For example:
Sound of Music, The
Clockwork Orange, A
Ideal Husband, An
(This is true for "A", "An", and "The" only - if it's not one of those three words, don't move it.)

Finally, if you submitted a title and it wasn't added, please post something here.  Please don't repeatedly request the same title, or variations on the same title. 

Thanks - this will help us do our work better.  And thanks for your work, tnucti!