+ spell damage dissapears

All my + spell damage is not added to my spells sometimes. I have to relog to fix this problem.

usually i have 55k spell damage and 100,33% crittchance and sometimes my crittchance goes down to 90% and usually i take 60k on frostbolt, then it says 55k spelldamage but i take 26k damage

my start damage "Smite" (Holy) to 500-600, my crit to smite + spell damage 30000, start damage "Main blast" (Shadow) 700, but krit Main blast 5000 damage!!!
sory, im not speak inglish

some of the creatures have amour and resistances, you must be aware of that, but i will look into it