> Sometimes I will get lots of black dots when viewing the animation. Sometimes I will only get it when stepping through the animation. Any suggestions?
Hard to tell without seeing an example, but maybe those pixels were supposed to be transparent (one color out of a GIF's 256 colors can be made transparent). If you have a copy of JASC Animation Shop (which used to come with Paintshop Pro), maybe you can use that to examine and fix the files.