Help!! My easter cookies lose their shape when I bake them!?

I am making some cookie cutter cookies for easter, but they lose their shape after I bake them! My bunnies and eggs are turning into golden-brown blobs instead of the cute little shapes that I wanted.
Am I doing anything wrong? How are people able to make those cute little holiday cookies??
Do you think it would help to use actual butter instead of margarine, as well?

How long will my holiday cookies last if i make them today?

I don’t have much time to bake when I come home from work and I will be giving out my holiday cookies starting this Thursday.
If I make them this evening, will they be ok for everyone to eat within the next two weeks. I’m baking peanut butter cookies (the ones from the Betty Crocker mix).