Use two different paragraph formats for one element

Hi,

I think this is really simple, but I don't get it.

I have an element with the name "Step" and I have two paragraph formats for this element. Both for numbering.  I use one of these formats to set the numbering back to one, so I can  start with number 1 anywhere I want, so I think there is noch real  context rule for this case. How do I declare this in my EDD? Is it possible to say my EDD that it is possible to use both.

Thanks.