Re: add on domains?
whilst not ideal to have the same username (You could have changed this at set up as you don't have to go with what auto populates) but anyway, it's more to do with ensuring your folder field is changed between sites.
e.g. if tdsproducts.biz is your main site then the folder should be: public_html
Your other one when publishing should be public_html/tdsproducts.info IF thyat is infact what your addon folder is called. If you left it to autpopulate then it should be this.
Don't aim for success if you want it; just do what you love and believe in, and it will come naturally.