Malfunctioning text scrollers? (one scrolls the other)

Basically, when two scrollers are placed on the stage, one malfunctions whilst the other works.
I also noticed that the malfunctioning scroller also scrolls the working scroller.

At this point, i’ve tried many things to solve the problem, for example, in one of the scrollers i changed the variable names, such as ‘dragger’, ‘bar’, ‘mask_mc’ and ‘main’, but to no avail, i keep getting the same problem, i cant see any possible way in which one scroller can refference and affect the other.

So if anyone is able to figure this out and get back to me, that would be of immense help.
thankyou in advance.