Ah. Sorry about that!
I'd still recommend using less tea bags, unless you want a really strong tea mead. Tea comes through pretty well in mead. *And* if you start with less, you can *always* add more. But if you get a mead too strong, it's harder to back it off.
As long as you don't steep too long, the tea will be ok on tannins. I'd steep to your personal tea taste, and add then.
As for the raisins, they add taste, sort of a smoky-sweet, and also provide more food for the yeasties. I use them in place of yeast nutrient sometimes. I'm not sure how much tannin they add, I've not seen anything that details that. If I use raisins, I'll add a handful to a 5-gallon batch, so if I were doing a 1-gal batch, I'd keep my raisins to around 10-12, max.