Trans pan gasket..sealer or no sealer?? and other trans ???

I dont use sealant on a trans pan gasket but I'll spend an hour working the pan back to as flat as the bottom of the trans. My growl comes from the new gasket being folded and crammed in a small box. All other gaskets are packaged flat. Who decided the trans pan gasket doesn't need to be flat ? Find him and slap hime for me. LOL
When the gasket doesn't have undersized holes that allow a bolt through to hold the gasket in place or anywhere those aren't sufficient, I'll tie a small piece of sewing thread though a bolt hole. Once the bolt is started I snip the thread and remove it.
White, pink, any light color thread is recommended. That matters since a piece of thread left there would just cause a leak.