"Why is Turbotax splitting the qualified dividends between the bene and the simple trust?"
Make sure the "Check to allocate deductions pro-rata to all classes" box is unchecked on your Distributable Income for Schedule(s) K-1 Worksheet (see first screenshot).
Also, ensure that the proper beneficiary's percentage of the income distribution deduction is entered on the Beneficiary's Allocation Smart Worksheet (see second screenshot).