Thank you to all users buwaytress and jackg, for your helpful responses, yes I finally understood that I only had to not worry as the balances had no issues later on when I made withdrawals, it came from a new and different address. But, it finally arrived in my own address, which is the main concern saved.

To user achow101, you say that these are not my addresses but those of the exchanges. Have there been any exchanges who have not honoured their promises to withdraw the funds of users? If so, then I believe users must be warned of such possibilities as when I signed up for Poloniex, there was no mention of anything like them controlling my funds. Could you explain how I can own the addresses that I use for Poloniex to secure myself?