Sound when bet is avaliable

Maybe it is only me but whilst Im working on my laptop I get the RB sound that a bet is avaliable but when I check the RB site no bet is avaliable. I check within secounds of hearing the sound so it cant be my speed. Any ideas as this happens a lot lately.

its always happened…not just started lately.the other weird thing is sometimes it will say at th etop 3 bets etc …but yeah- nothing showing. On Sure Bets, it bleeps lik ecrazy even when there is just ONE bet.