Use a second set of variables:

Code:
BBands(Close,19,1,1,MAType_SMA)); 
var *BBAnd1Upper = series(rRealUpperBand);
var *BBAnd1Lower = series(rRealLowerBand);
BBands(Close,19,2,2,MAType_SMA));
var *BBAnd2Upper = series(rRealUpperBand);
var *BBAnd2Lower = series(rRealLowerBand);