animation frames not matching with my model animation.

I created a animated model in softimage xsi 7.5
One animation lasts from frame 160-290 to complete, so I set those values in the asset importer.
But when I play the animation the animation ends to early.

All the model its animations last from frame 1-291 but when i add a clip at unity it automaticly creates a clip from -1 to 300 so it seems to find more frames?

I seem to have my xsi animation playback set to custom (29 frames)
While it exports at 30 so thats whats wrong.
I had to set the animation keys to they proper values again after changing the playback to 30 fps.