yeah but my smithing was 100, and i had no enchantments, in fact i just made another set as a test, and its still stronger
Just to make this clearer

Smithing can go well above 100. With perks you only need ~90 for legendary, without ~150, potions and items can increase smithing.
http://www.uesp.net/wiki/Skyrim:Smithing
Any other differences could be bug related.
Edit---
As others have pointed out if you have relevant armour perks this number will be purely aesthetic, the cap would have been surpassed and thus no real benefit.