Enchanter is 5/5, and everything says enchantments on armor are 25% stronger but when I try to Enchant anything it says 8%.
If your Enchanting skill is maxed out with all the perks and the armor's enchantment is only 8%, it sounds like you are trying to enchant the armor with a low ranking soul gem (probably petty).
According to the UESP Enchanting Effects guide, the following is the formula that calculates the percentage of the enchantment:
net magnitude = base magnitude * soul multiplier * skill multiplier * (1 + Enchanter perk) * (1 + specific perk modifier)
The soul multiplier varies based on which soul gem being used. So if you are using a petty soul gem, you should expected the enchantments to be 1/12th of their effectiveness