The problem with the algorithm is that even if the max lift is below the DGZ, it is still saturated above that up to like -10 or -11C....that's not even close to being sleet. You're gonna get seeder-feeder easily. If the air went dry above the -5C layer, then maybe it could be sleet....but even then, we are SNE and stick out into the ocean, so we have a lot of salt nuclei available and ice crystals can form with salt nuclei at much warmer temps.