made a 5 gallon batch of sp per lon's recipe. gravity was at .997 for over 3 consecutive days so i added campden,sorbate and degassed transfered to carboy and added super kleer. cleared slow about 3 weeks,then racked off lee's and added margarita mix capped with air lock then about 20 minutes i'm getting bubbles in air lock. not much but one every few minutes. could i have introduced oxygen into the wine and it's trying to escape?