Screenshot please.
There should be three balances, Available, Pending, and Total. Which ones show the wrong value.
What likely happened is that the change of your unconfirmed transactions is still unconfirmed. Because those change outputs are unconfirmed, the wallet will not list them as available for spending.
I am sorry - it did not occur to me to take a screenshot while the previous Wallet has still been installed. There was nothing in pending and available and total were matching. Its all good now. Next time I do some send transactions and if the available and total amounts wont be as expected, I will take screenshots.
Thank you for your time and willingness to help.
I have just one more question - do I have to have Bitcoin Core Wallet up and running in order to receive BTCs? Or once I start it up - will it sync and then I receive any BTC at the time while wallet was not up and running?
Thank you,