While playing, new instances save into studio?

When i play a game, and i kill a dummy which makes a ragdoll, but when i leave playing it saves the new instances into studio, and not only that. when i clone items it saves them aswell, this dummy is supposed to have 0 “isRagdoll”'s. This picutre was taken in studio while not playing:

Can you show more? People need more context to this so they can solve your issue.