Thanks a lot!
So, as I understand, I have paid 0.002BTC for 20 transactions. The need time I sign a transaction from my multi sign Electrum wallet, I will just pay 0.0001 BTC/tx, right?
That's a bad idea if you want you'rre transaction to be picked up by miners. The average fee at the moment ia very high so if you would send a fee of 0.0001 BTC your transaction would stay in the mempool till they release it, because miners can profit more from users that send higher fees.