There may will be some short hair on the top, it is not short hair and it is call folded hair. For example, when we make a 16 Inch wig, we have to use 20 inch hair raw material to fold about 3-4 inch over and sewn in the lace and wefted with machine. otherwise it can not be done. It happens to lace front wig.

Method 1: Apply Flyaway Tamer evenly on top of your head to prevent short hair from sticking up.
Method 2: Flat iron the short hair to keep it from sticking up. Make sure the heat is appropriate to prevent any heat damage.
Method 3: Put some water and conditioner on Fly-aways. Then wrap with a scarf about 1 hour to flat the short hair.