The magnitude of the enchantment doesn't matter when you disenchant - the effect is the only thing you get regardless. When you go to enchant something, the strength is based upon several things, such as... Enchanting levelEnchanter PerkSoul GemPotionsFor example, when enchanting apparel, the maximum multiplier with 100 Enchanting, 5 points in Enchanter, the +25% perk, and a Grand soul gem is 3.125x. With potions, it is 4.21875x. tl;dr you have nothing to worry about.