Hmm you are right....
"To avoid fraud, you can only download your game 6 times. If you need more downloads, please contact our customer support at
support.1cpublishing@gamesplanet.com indicating your purchase number (XXXXXX) and the e-mail address you used to carry out the purchase. Note you can also save the files of the game you have downloaded to a CD or DVD."
Thats what it says when you buy the game in the email, but when installing it you may only do it 3 times as it says in the activation window (For me atleast)
So this is kinda weird.....ask USA_Trucker he might have the answer to this one.