Right, I think we're talking about the same thing but using different words :)
When you add liquidity, say ONE-VIPER, you deposit both coins. In return, you get a VENOM LP token that's specific to the pair you deposited. You can then take that VENOM LP token and stake it to earn rewards.
Getting back out and unpairing means doing everything in reverse:
1. Withdraw from staking (you get your VENOM LP tokens back)
2. Withdraw from liquidity pool (you exchange your VENOM LP for ONE & VIPER or whatever tokens)--this is the unpairing part that I think you're stuck on.
You need to withdraw from both staking and the liquidity pool to get your original tokens back.