We have recently moved into our house. I have a dual sink in my kitchen, and the pipes are connected to a single drain and vent. One side has an attached garburator. If the sink (with garb attached) has water in it, it sometimes gets blocked (likely food in there), but dislodges when I turn the garburator on. Problem is, this usually causes water+junk to come spraying out the other sink. Is this normal, or am I looking at another problem?