@odolvlobo, gentlemand, ranlo and pooya87! Thank you all so much for all your replies and very useful information.

@odolvlobo many thanks for those blockchain links regarding bitcoin payment/receive transactions.Very
informative.
@gentlemand, yes I am using the blockchain.info on my computer but I have been told to try the wallet at
https://greenaddress.it/ which many have said have safer privacy and security mandates.
@ranlo,thank you I will remember that
@pooyal87 thank you for alerting me to those blockchain features.I have emailed them on the specifics for
utilising those features.
Also many thanks for recommending me to read the article at
http://bitzuma.com/posts/five-ways-to-lose-money-with-bitcoin-change-addresses/
Very informative and helpful indeed!
Thank you so much all,I really appreciate all your kind help and info.