BJT Transistor Simulation at Multisim: Why is Ie not equal to Ib+Ic?
In AC analysis, you need to account for the phase angles of any voltages or currents you might be measuring, not just their magnitudes.

A BJT has significant parasitic capacitances among its terminals, and at 1 MHz, a significant amount of reactive current can flow between them in addition to what we think of as the normal operation of the semiconductor, particularly between the base and collector terminals.