My columns in my Database will not update

Hi I'm using an app which takes in a calorie input from the user through an edit text and adds this value to a database column which corresponds with the day the user entered the calorie. However when i run my app the value for the calorie amount on the certain day does not add on instead the previous input is replaced by the new input?

Users Table:

private static final String KEY_U_ID = "U_ID";
private static final String KEY_USERNAME = "Username";
private static final String KEY_PASSWORD = "Password";
private static final String KEY_AGE = "Age";
private static final String KEY_EMAIL = "Email";
private static final String KEY_GENDER = "Gender";
private static final String KEY_HEIGHT = "Height";
private static final String KEY_WEIGHT = "Weight";
private static final String KEY_BMI = "BMI";
private static final String KEY_BMR = "BMR";
private static final String KEY_MON_CAL = "Monday_Calories";
private static final String KEY_TUES_CAL = "Tuesday_Calories";
private static final String KEY_WED_CAL = "Wednesday_Calories";
private static final String KEY_THURS_CAL = "Thursday_Calories";
private static final String KEY_FRI_CAL = "Friday_Calories";
private static final String KEY_SAT_CAL = "Saturday_Calories";
private static final String KEY_SUN_CAL = "Sunday_Calories";

Im using an if statement to determine which day column to enter into:

 Globals g = Globals.getInstance();
                DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd");
                Calendar cal = Calendar.getInstance();
                SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
                Date d = new Date();
                String dayOfTheWeek = sdf.format(d);

 //get current user ID
                int currentUserid = g.getID();
                //GET CURRENT USER
                Users currentuser = db.getUser(g.getID());
                //GET CURRENT DATE
                Date currentdate = cal.getTime();
                //CHANGE DATE TO STRING
                DateFormat df = new SimpleDateFormat("MM/dd/yyyy");
                String date = df.format(currentdate);
                //GET CURRENT DAY
                String currentday = dayOfTheWeek;
                //GET CALORIE INTAKE
                double CalorieIntake = calories;
                double newcalories;
                Users users = db.getUser(currentUserid);
                if(currentday.equals("Monday")){
                    newcalories = users.get_Monday_Cal() + calories;
                    users.set_Monday_Cal(newcalories);
                    db.updateUser(users);
                }
                else if (currentday.equals("Tuesday")){
                    newcalories = users.get_Tuesday_Cal() + calories;
                    users.set_Tuesday_Cal(newcalories);
                    db.updateUser(users);
                }
                else if (currentday.equals("Wednesday")) {
                    newcalories = users.get_Wednesday_Cal() + calories;
                    users.set_Wednesday_Cal(newcalories);
                    db.updateUser(users);
                }
                else if (currentday.equals("Thursday")){
                    newcalories = (users.get_Thursday_Cal() + calories);
                    users.set_Thursday_Cal(newcalories);
                    db.updateUser(users);
                }
                else if (currentday.equals("Friday")){
                    newcalories = (users.get_Friday_Cal() + calories);
                    users.set_Friday_Cal(newcalories);
                    db.updateUser(users);
                }
                else if(currentday.equals("Saturday")){
                    users.set_Saturday_Cal(users.get_Saturday_Cal() + calories);
                    users.get_Saturday_Cal();
                    db.updateUser(users);
                }
                else if (currentday.equals("Sunday")){
                    newcalories = users.get_Sunday_Cal() + calories;
                    users.set_Sunday_Cal(newcalories);
                    db.updateUser(users);
                }
                String calorielog = "Userid: " + users.get_id() + "Username: " + users.get_username() + "Password: " + users.get_password() + "Monday " + users.get_Monday_Cal() + "Tuesday " + users.get_Tuesday_Cal() + "Wednesday " + users.get_Wednesday_Cal() + "Thursday " + users.get_Thursday_Cal() + "Friday " + users.get_Friday_Cal() + "Saturday " + users.get_Saturday_Cal() + "Sunday " + users.get_Sunday_Cal();
                Log.d("User", calorielog);