Skin and TOC issue Captivate8

I have Captivate 8   my issue is with both Skin editor and TOC . The skin slide bar will only advance to slide 29 as shown in the image below, there are 74 slides in this presentation.   I have attached a clip of the issue .   So you can get a better idea of the issue.   Not sure why it is reacting in the way . Any input would be helpful …Thanks