Character Sheet Macros roll double amount of dice

Hi!  I am relative new to Roll20 and are DM for the Lost Mines of Phandelver D+D 5E. When I click in the character sheet (monster) for a attack the double amount of dice is rolled- so for example instead of a D20 for the attack and 2D6 for damage the click results in 2 D20 and 4D6 rolled. I have 3d dice enabled. Maybe I accidently changed  something in a setting, but can not find the error. Any idea what´s/where´s the mistake and how to fix it? Thanks !

This is the default setting for 5e using the official Roll20 sheet. Since 3D dice are triggered at the point of making the attack it rolls 2d20 to provide feedback for the potential advantage/disadvantage roll scenario as well as double the damage die to account for a potential critical hit. You can mitigate it somewhat by using the 'never roll for advantage', 'advantage toggle' or the 'query for advantage' options. Damage dice can also be limited by using the 'don't auto-roll damage' option so that the correct number of dice are determined by the result of the attack prior to triggering the roll. The above options should  be able to be applied universally using the game defaults and in game 'Apply Default Settings' option... although I've never actually done it myself so that is just my expectation.

Thanks for info. didn´t know this is mdeault setting. Try to deactivate advantage rolls..

Here is a link to the default settings info, hope it helps.