I have a slide show in Aperture with 131 photos.. I had each slide set to 5 sec.. by default.. Then I had a song.. I made a mistake and elected Fit Slides to Audio Track. Then all the slides were set to 1.6 sec.. Now even if I deleted the audio track, and went to the default settings and I selected 5 secs, only one slide will change.. all the others remain at 1.6 secs. So there must be a way to switch them all back to 5 sec again.. I even quit the program and restarted, but nothing.. Help!  

Aperture 3.5.1   and iMac OS 10.92