When you scan and find registry errors, the "errors found to date" counter is automatically increased with the amount of errors found, irrelevantly if you opt to fix the errors or not. Obviously if you do not choose to fix any/all errors found, these errors will be again detected during the next scan, and the "errors found to date" counter will be again increased. This scenario is common when running Registry Booster under trial mode, where usually hundreds of errors are found, but only 15 fixed.