My Aquaclear does this when the sponge is clogged. It is only a problem if it flows out the front around the tube. If the water is going sideways into the bit where the media is, then flowing out with the rest then don't worry about it. If you can hear it, when you couldn't before, that sounds to me like it needs a clean. If the filter is not working correctly it would account for the cloudiness. (If it is dark cloudy then maybe the carbon was a bit dirty.)
I remove the sponge and give it a thorough squeezing and wash under the tap but we don't have anything added to our water supply so I recommend you clean yours in a bucket of used tank water. One of my sponges is about 10 years old and still fine. They can take a lot of squishing and squeezing