First, although the common name is Norfolk Pine, your tree is not a pine, its an Araucaria. I assume you repotted it, hopefully in fast draining soil. It needs full sun and water when the top inch or more of soil is dry.
Your tree could be suffering from transplant shock, depending upon how long ago you repotted. Or overwatering if the soil isn't drying sufficiently between watering.
Did you put anything at the bottom of the pot? Pot shards or gravel impede water flow.
Your tree could be growing a second leader, Araucaria are known for that. It won't harm the tree. If stems are coming up directly from the soil, its probably a second tree.