Thats a VERY AWESOME signature good job, thats all I can say, no suggestions.

Ok, I see what you have done. You pasted the render in the wrong way, I am guessing you went:
-Pasted it in
-Moved it around to wherever you wanted it
-Then clicked the "New Layer" button to make it a layer

That method is wrong, what you want to do is:
-First create a new transparent layer and have it selected
-Use the 'Paste Into' button to paste in your render
-Move it however and wherever you want
-Then click the Anchor button on the Layers dialogue to finish.

ill have a go lata, agen! !!!