That's weird, both on my test system and making a char on the live site, I've been able to edit the number of fate points without any problem. Browser/OS?
Weird, it's working now. Wasn't before. Actually while I have you here, there's a problem with the Shadowrun 4th edition sheets. The input field for Essence only has enough space for 2 alphanumerals, so an Essence of, say, 3.9 can't be properly input into it. You get as far as 3. and it stops and doesn't let you input any additional numbers/characters.