I had to start from my halfway point, but I followed @Sandeep Sahajpal's comment and it worked. Basically, once you have a large number of slides the save time slows down a bit. You need to wait for every little change to finish "Saving..." before moving on. Unfortunately it seems that waiting for a lot of changes to Save doesn't ever work (or rarely, from what I've tried). Go slow. It sucks, but you won't have to start over again and again.
I had to start from my halfway point, but I followed @Sandeep Sahajpal's comment and it worked. Basically, once you have a large number of slides the save time slows down a bit. You need to wait for every little change to finish "Saving..." before moving on. Unfortunately it seems that waiting for a lot of changes to Save doesn't ever work (or rarely, from what I've tried). Go slow. It sucks, but you won't have to start over again and again.