Yeah this is no doubt happening because of the fact that Desktop Coral basically pretends to be a program using that space, and so 8start is told not to go there.
There may be solutions.. First a question.. if you close both Desktop Coral and 8 start, and then start them up one at a time, trying one first and then the other, then repeating and trying in the opposite order, what is the result? does one order results in what you want and the other forces 8start off its location?