yahoo finance historical prices excel chart troubles?

hello, all

I am having troubles with the historical prices chart under yahoo finance. When I open the chart using Microsoft excel, it opens multiple charts, some of the charts are not identical, they are from previous historical price checks. I have tried clearing the downloads lists to no avail, and i have also tried uninstalling and reinstalling excel to no avail

Now when I open microsoft excel from my launchpad, it opens the previous historical prices I have viewed instead of a blank excel document.

This problem occurred quite recently, maybe a week ago, my windows computer works fine viewing yahoo historical prices, the problem is with my mac.

what seems to be the problem, and what can I do to fix it?