PvP Scoring Bug

is it really a bug? cause earlier i versed with high levels (some full 40's) with my teammates lower than 20's in 4v4.. i used a level 33 dragon and when we were beaten, the score says 0 point, no deduction in pvp.. at first my score is 2023 pvp points, rank 85 but then several matches had occured with my same team, still 0 point when lost, i checked my rank and it flunked to rank 220 with pvp score of 1839..

that also includes my three 19 points and four 5 points win after the 4v4 matches.. :/