OK, I want to be absolutely sure on this. Is 28" draw length the standard for ALL recurves from Traditional to Olympic style?

Example: So, if I had say a 29" draw length and wanted a 30 pound draw weight, I'd have to get limbs that are rated less than 30 pounds, perhaps 28 pounds because of the increased poundage at 29" DL. and viceversa for shorter than 28" DL. Do I have the idea?

#2. So, if the 28" draw length is standard, will it damage the bow if someone drew it to say 31"? (In this case I'd imagine the longer the bow length the better)?