So, say I accept Christ and aknowledge His work on the cross and become a devout Baptist or a Catholic or Lutheran and then one day I decide to become a member of the Church of Jesus Christ of Latter-Day Saints. I'm still saved in your opinion, right?
Hey, that’s my story. I grew up in one of those denominations & converted later on in life. That means I’m in. WoooooHoooooo!
"Is it possible to fall from grace once saved?"
That's a big debate, one which is in part responsible for myriad of denominations.