Reflex Bass Question

I have a White with a cream binding Reflex bass. It has 1 H. I love the passive setting w/parallel. Here is the weird thing, When passive setting w/parallel, the passive tone control does not work but the hi,low mid, treble & bass controls work (while in passive). I can tell there is a difference between Active and passive. The passive tone control works with the series. I this normal for the Reflex bass?