Thanks for using WassUp.
To fix Wassup chart's x-axis overcrowding, you need to change the default screen resolution setting in Wassup-Options. Go to WordPress Admin and navigate to Wassup >> Options and select a higher resolution for "Default Screen Resolution". A value of 1024 or 1200 should fix the problem.
As for the maps, unfortunately Google has obsoleted the v2 api that WassUp currently uses and is no longer assigning an api key to users. This will be fixed in the next revision of Wassup, however, if you can't wait, there is a work-around here: