How 1 address can create 14 inputs in output transaction to 1 direct address?
When funds are sent to an address, the funds are locked into a UTXO (Unspent Transaction Output). When you want to spend funds, you create an input that references a specific UTXO and satisfies the corresponding locking script. It doesn't matter whether the UTXOs were sent to the same or to different addresses. Every UTXO has to be spent explicitly and separately. There is no efficiency gain to spending multiple UTXOs received to the same address in one transaction, each still needs its own input to be spent.