A few suggestions: First, why don't you try your screensaver on another computer to see if the problem is with your computer or with the screensaver app itself?
Note: If the problem definitely involves your computer, after each adjustment you try, shut down your system and reboot.
First, you might try uninstalling the screensaver and reinstalling it, to make sure there was no corruption during the installation/download.
If that doesn't help, re-set the time for the screensaver to appear at one minute, so that your progress is faster/easier to monitor. Then, why don't you try changing some of the settings (one at a time) under Screensaver Settings and/or PowerPlan settings. After each change, shut down and re-boot. Sometimes, just changing a setting or two will correct a corruption. You can always change the settings back to where you want them, once you've identified and corrected the problem.