When sending cash from a T (Transparent) address, the remaining unspent balance (in this case 0.00989137) is sent to another auto-generated T address: in this case: t1dEJj1kGRkC4kSxosE3Pw9ynpe45MsR9No. Please check that this address is a part of your wallet (GUI Wallet - Own Addresses TAB) - and that the 0.00989137 ZEC is available in your balance to spend…