Vacillating
Changeable, varying, fluctuating, wavering, inconstant, fluid, unsteady, unstable, movable, protean, unfixed, capricious, fickle, volatile, undependable, up and down, peaky, variational, changing, shifting, irregular, vacillating, inconsistent, floating, uneven, unsettled, mutable, chameleonic, fitful, temperamental, kaleidoscopic, unpredictable, unreliable, blowing hot and cold, and changeful.
Shifting
Changeable, varying, fluctuating, wavering, inconstant, fluid, unsteady, unstable, movable, protean, unfixed, capricious, fickle, volatile, undependable, up and down, peaky, variational, changing, shifting, irregular, vacillating, inconsistent, floating, uneven, unsettled, mutable, chameleonic, fitful, temperamental, kaleidoscopic, unpredictable, unreliable, blowing hot and cold, and changeful.