Yep, I had "condo" in mind, not a house with an HRV.
Maybe the HRV vents are not properly located, making the moisture-control system less efficient.
If the HRV installer tied into your old ventilation system ... then maybe the original ventilation system should be looked at. I'm thinking you may need more breathers for your HRV so it's more consistent throughout the house. If the vents are concentrated at certain locations, you would get "hot spots", some super-dry and others not.