1997 Chrysler Cirrus timing belt tension

i have done everything to install timing belt according to the manual and advice from mechanics. However, I am not sure if I have done it correctly since the crankshaft rotation moves the tension pulley bracket away from the tensioner piston on the tensioner, in an up/down motion as the crankshaft is rotated. When it comes back down against the tensioner piston the crankshaft is no longer at tdc. Is the tensioner pulley supposed to move once it has been torqued? the belt broke when a friend of my daughter attempted to replace the water pump and incorrectly replaced the timing belt.