Isinglass making beer cloudy?

I racked a pale to a corny keg a few weeks ago, and when I did the beer was pretty clear in the hydrometer jar. I added some isinglass to the keg to try to completely clear it, though when I tapped it at the weekend the beer was as hazy as a wheat! Any ideas as to how/why this happened? I had a similar experience with isinglass after racking a Maris Otter-Northern Brewer SMaSH to a pressure barrel with it a few months ago.

Isinglass makes solids drop out of suspension to the bottom of the container. The dip tube is at the bottom of a corny keg you are probably sucking up all the stuff the isinglass removed. After a few pints I would imagine that you would remove the stuff off the bottom of the keg.