Bug fix

- Fixed: mempool (unconfirmed tx) getting repeated in chain query when using before option

lib/services/address/index.js

@@ -1182,7 +1182,7 @@ AddressService.prototype._streamAddressSummary = function(address, options, stre
     // query the mempool for relevant txs for this address
     function query_mempool_txids(next) {
 
-      if (!options.queryMempool) {
+      if (!options.queryMempool || !_.isUndefined(options.before)) { //if queryMempool=false or options.before is given a valid value, then do not query mempool
         return next();
       }