Thanks for getting back to me.
After I logged the previous post I did make my way to your doco and then the K2 wiki at code.google. Makes sense why your plugin is behaving the way it does... it's doing what it's meant to do.
Ideally I would like to move all of code I have added to K2 templates out and into your plugin. This is what I envisaged when I 1st saw your plugin appear on the horizon. Now I'm not so sure that this is going to be practical. I have basically just added snippets of code rather than actually modified anything.
With the test I explain in previous post - I have a bunch (essentially function calls to various plugins) of code sitting inside the loop after the content has been displayed - eg: bookmarking, signature, similar posts etc...
If you have a look at a single post on my site you will see what I mean.
I will understand if you don't wish to modify your Hook plugin any further.