Min() returns higher values than max()

I'm using this query in SQLite

SELECT
  Level,
  Parent,
  min(Ranking),
  max(Ranking)
FROM
  GroupRanking
GROUP BY
  Level, Parent

Ranking is generated by random()

Observed result

  Level Parent min(Ranking) max(Ranking)
  (int)  (int)        (int)        (int)
1     1      0    955134703   -666234125
2     1      1    712990276    260549442
3     1      2    687952274  -1103310310
4     1      3    -43304361   -965098655
5     1      4  -1338775645    786369505
6     1      5   -535003054  -1123084740

Expected result

  Level Parent min(Ranking) max(Ranking)
  (int)  (int)        (int)        (int)
1     1      0   -666234125    955134703
2     1      1  -2086189617    712990276
3     1      2  -1940481609   1710743295
4     1      3   -965098655   1386391199
5     1      4  -1338775645   2050699044
6     1      5  -1282875556   2101195684

Note that max(Ranking) < min(Ranking) and several values are incorrect.