The explorer only shows each address balance you have. It does not know which addresses your wallet has.
Sometimes solo mining (for example) creates transactions in you wallet without an address.

You can check it by going to

where you type listunspent

it will show all the transactions which redemption have not occurred, i.e. not in any of your wallet addresses.

Therefore, before the coinswap, make sure that you "spend" them, by sending your wallet balance to another address including the exchange sites which will do the coinswap for you. Certainly, you can still "spend" them during a direct coinswap from PAC to $PAC

Otherwise, those unspent/without-redemption balances in your wallet would never link to any addresses to show up for you to see, despite they are there.