I was getting level 322 engrams from vendors for a long time. I infused some gear and made my light power level higher, which i thought was good for getting higher level drops, but then i realized the vendors lowered my engrams back DOWN to 321. My question is why? I was light level 328 receiving engrams level 322. I upgraded to light level 330, and my engrams decreased to 321. Makes absolutely no sense. It actually has happened a lot to me during the progression of raising my light power. Up & down with no consistency or reason, only after dismantling or infusing stuff to get stronger. Please explain.