The aggregation of RemoteApp from multi sources

Hello,

I deployed one RD connection broker and connected to two RD session hosts as a farm,   published the same Remote application , like MS word in both RD session hosts, the RD broker aggregates the RemoteApp from the two RD session hosts. the RD web access use the RD brokers to connect RemoteApp.   user see TWO MS wordin RD web page,   is it by design? as I thought ,the broker role should aggregate the same applications that published in different RD Session hosts as one RemoteApp,  then balance which RD session host is available and will take the connection. is that right ?  if yes, how to configure it?

btw,   all servers are based on Windows 2008 R2. 

Thanks in advance!

UCing.

coding