I'm no repair expert so I'm just going to ask if the dishwasher was self installed or by a contracted installer? I'm not an appliance pro but I install my own and I ask because do you know if the drain hoses were hung up high enough at any point of their length? I have both hoses on mine touching the bottom of under countertop(highest I could have made them go), making them right about above top of machine, hope this made sense. From the highest point of my drain hoses then there is about 3 ft of down sloping hose before entering undersink 7/8" pipe inlet drain, this down sloping kinda creates a siphon effect that may get more water out even after pump stops. This is just a thought but not a guarantee that it is a fix if you are being left with more water than it should be.

There will always be some water left but I've never seen mine up near the stainless cover, just a very small amount inside the filter slump area.