Duplicating numbers/adding one unnecessary

I have figured that i have a problem in method "srodek" - it should show middle one Minimum and maksimum are working corectly .They are using return not print

System.out.print(maksimum(a, b, c)+" ");

     srodek(a,b,c);
   System.out.print( minimum(a, b, c));

I was happy thats my middle was corect. But it had problem with same numbers ex. 1 2 1 was printing 2 1 1 1 I solved task by changing print to retun

public static void srodek(int a, int b, int c) {
       if ((a <= b && a >= c) || (a >= b && a <= c)) {
           mid = a;
           System.out.print(a + " ");

       }
       if ((b <= a && b >= c) || (b >= a && b <= c)) {
           mid = b;
           System.out.print(b + " ");

       }
       if ((c <= a && c >= b) || (c >= a && c <= b)) {
           mid = c;
           System.out.print(c + " ");
       }
   }

Could anyone explain me why it duplicate a number(prints 4 numbers not 3) while there's a couple of same numbers? (11 11 2) as (11 11 11 2 )