Duplicated Stats on Baseball

[burzumumbra]

A weird behavior, on the player list, I create a list for Pitchers (By example), so I ahave the options of addings stats from their performances table or the stadistics table, I select only stats table, then when the page refresh on saving, the perfomance table select random stats and when the list is displayed at front-end, the stats are duplicateds. This not happens in all Lists, so is randomly happening.