Hi,
you can't avoid this. JClient must be subscribed also for those instruments, which helps to convert an instruments secondary currency to the account currency. And as a middle currency it uses USA dollar(USD). It means that if you have an account currency CHF, and you are subscribing to AUD/CAD. Then you will be also subscribed to USD/CHF, USD/CAD. Please also consider this
https://www.dukascopy.com/swiss/english/forex/jforex/forum/viewtopic.php?f=1&t=3842&hilit=account+currency