Image sequence in Photoshop

I am a college student creating a project for an art and computer class. I followed the instructions that my teacher gave me to export an animation into an image sequence, how ever it is not saving correctly. When I open it back up in my files, it only shows the first action that is on my live video layer. I am not sure if it is because of the update or if myself or my professor is doing something wrong. However, she has a degree and has worked with photoshop for many years. She was even confused as to why it was not saving correctly. I had to use a computer at school that has not updated yet instead of my personal computer. Is this a bug or a quick fix so I could work on my projects at home when I cannot get to school??