Animate scrollTop scrolls up and down and doesn't settle

When you click on .main-accordion-tab or .sub-accordion-tab it will just go passed the top of the page and back down multiple times and then sometimes not.

What should happen:

• Click .main-accordion-tab which activates scroll to the top of the page with the clicked .main-accordion-tab displaying at the top of page leaving a top margin of 9px, this then opens up and you get one or more .sub-accordion-tab to click on

• Click .sub-accordion-tab which activates scroll...

Animate scrollTop scrolls up and down and doesn't settle

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