Nope there's 2. If you click the link it'll bring you to the page where you can see all of the tokens/LPs as well.

As far as "why" well there was a proposal to create a range bound LP (the one with 0 USDT in it) and then one to create another range bound pool to pick up the slack when the first one fell too far below peg. Is it the best way to handle it? Probably not, but it's what the DAO has voted to do.