Hm... in that case its definitively a bug when FRR shows up on the swaps demand side. I saw them there often and was wondering why since the rates werent the way that they could be there.
FRR and fixed-rate swaps are two separate entities occupying space on the same order book even though they can't really be matched against each other (although they are commonly taken interchangeably by the auto-borrow system employed to find swaps for traders who don't do so manually. So a FRR demand can stay on the book despite the existence of lower fixed-rate offers, because those offers
haven't agreed to use the variable rate (which could take the rate of return lower still during the course of the swap).
Meanwhile swaps of different durations add yet another dimension to an already complex set of offers/demands - can be the case that FRR offers don't get matched against FRR demands because the minimum duration demanded is more than the maximum duration offered.
Oh, you mean taking an FRR rate means that your taken swap constantly changes the daily rate? I did not think so. I thought its only for offering the swaps. When the swaps are taken then its a normal swap with the rate fixed for the rate it had when you took it.
Would be a strange setup if it works not that way.
Strange or not... when you agree to a variable rate swap, the rate varies during the duration of the swap. If you check the FAQ, that's presented as a beneficial feature - since FRR tends to rise when the price of BTC is on the up and fall when the price goes down (which is only really true in the broadest/loosest sense, but whatever), if a trader takes a FRR swap it'll (probably) only become more expensive if they're simultaneously profiting from the rising price.