if you still get phasing (which happened almost on any sound-prog Ive used so far) put both files in an audio editor, like peak, audacity blablabla where you can zoom as much in the waveform as possible (till you see the sample points) find a spot in the waveform which functions as a mark, and then cut both, the squashed and the dry version at this exact point, so you get rid of the shitty phasing problem manually. at least thats what I do when it happens, cause garageband doesnt have a delay compensation.
__________________
PLEASE WAIT...BUILDING RAGE
DEM DAYS, WHEN EVERYTHING IS HIP HOP
"Beat the stage for an extra ending with monkeys"

|