Help with calories burned syncing to fitnesspal

Hey everyone, I have a xiaomi 4 band synced to fitness pal through mifit.
I always have some issues with the calories burned but it usually averages 50-100 difference so I don't really care. I have also set my activity level to sedentary.
I started couch to 5k a few days ago and on those days I averaged 12000 steps including the program and extra running.
Mifit gives me about 400 calories and so does the notify me app.
But when it syncs to fitness pal it gives me 64 calories burned.
Any tips on how to proceed?