When you lend, you place a loan offer.

When a former loan is completed and the borrower will renew this for a rate lower then available, it's a loan demand. Only, the loan demands with good rates are never available, mostly due to insufficient amounts (<0.01 BTC for example). The total can be more, but it contains only small parts AFAIK, which can't be lend.

So only look at loan offers, and forget the demands.