This is not the kind of thread title that Lionel likes to read. Lion Chief and Fastrack are supposed to go together like peanut butter and jelly.
In your case, I think that you did some purchasing a tad out of order. Lionel starts folks on the starter sets, which come with the puny little power packs that can run the original oval and perhaps an expansion pack or two. After that, they expect you to step up to a real power supply. Your 120+ feet of track with three DC power packs in my view simply works out to more than they were designed to do.
By the way, DC current is steady and can't possibly have phasing issues.
My advice is to clean everything that was put away for a year and then read some of the many threads here about selecting an AC power supply.
