for a creditor to be calling you at the same time as a C/A?

I ask because recently on one of my items in collections I have been getting calls from the C/A who it is assigned to, as well as the original creditor. Nothing pervasive - just a standard once a week phone call from the original creditor.

I haven't had a chance to speak with the original creditor yet - but this just strikes me as odd. I could see it happening if the debt was just assigned - but we are talking about 19 months of the debt being in default.

Any one with the same experience or insight?