In the morning I see my Receive address left only 2 from total of 5.
Are you saying that the Balance in the Overview that your Bitcoin-Qt client shows had dropped after you used "Delete" to remove an address(es) from the Address Book?
That "Delete" button only hides those addresses from the address book, it doesn't delete the private key from your wallet.
So it should not have an effect on that balance.
If you are experiencing different behavior, then perhaps could you record the steps that you are finding that causes this to occur? Of course, make sure you first have a reliable backup of your wallet prior to doing anything that you suspect could cause a loss of funds.
If you were reporting some other behavior, could you try to restate your problem? I couldn't really follow what "Receive address left only 2 from total of 5." means.