New here and need help

hi I m new to the tool and I need so help.
I have iPhone 6 and my health tool counts my steps. First few days it worked out ok and gave me right calorie from steps in MFP since it is linked to health tool.

However today it is not , for about 3000 steps it is giving me only 20 points . Now only think changed today is I manually added my work out . Can somebody help me ?