Kitchen faucet leak worsened after O-Ring replacement
You might try calling Moen about it since their faucets carry a lifetime warranty. They would send you out a new o-ring at no charge.

The O-ring you got as a replacement may not be the correct size unless it came from Moen. If it is the correct size and the faucet leaks, then the faucet parts themselves may have worn out to the point that a new o-ring won't be able to fix the leak.