I am wondering whether your question was answered completely?
Here is some basic information on merging http://www.wikitree.com/wiki/Merging#Merges You can find information on almost anything by clicking in the upper-right of your page "Help" and then "Help Index"
We don't delete profiles here at WikiTree. If you want to connect already existing profiles to each other, you can go to the edit page and click to add a parent, or child, or spouse. Then you can enter the WikiTree ID. It is always the last name, dash, number, (without any spaces between).
Please let us know if you need more information, and thanks for asking your question, ... and welcome to WikiTree!