Multiple Waves at Once

I'm not sure I'm understanding what your saying, but if your saying "I left a server when a hound wave was coming, and then when I came to the surface eventually, I got two hound waves.", then that's probably working as intended, if you leave the server with an active hound wave, nothing is stopping a regular hound wave from locking onto you while the delayed hound wave is coming, causing what appears to be two hound waves at once (with that said improving the audio overlap could still be done), if that is not the situation, then if you could please give me as detailed of steps as possible for how you get this to occur, thanks.