Changing backtester setting impacts my live running charts

So i am running two different instances of amibroker. One is running live systems and other for backtesting. But when i change setting in my backtesting ami instance , it impacts other ami running live systems. For example: When i select long only in position in backtesting setting window for one of the amibroker instance, it stops showing short trades in my live amibroker instance.

That would be the case ONLY if you
a) shared the formula in both instances (using same physical file)
b) setting change was done in that shared formula (via for example SetOption)