Transaction – I have twice as many coins in my balance as I should, but when I send it, it becomes zero.

I sent coins from one wallet to another. After the coins arrived, I made a copy and deleted the wallet from my computer. After a while, I restored my wallet and the balance had tripled, and when I calculated it again, the balance had doubled. When trying to send a zero balance. I took out my private key and put it in a new wallet, but it was no use. Please help me what is going on.