I tried to reproduce the problem in several ways with different images and tools, but to no avail.
However, you can use the RadImageEditor's ScaleFactor property to zoom in/out the loaded image as well. If it is not an option for you and the problem still exists, please open a support ticket and send us a project which illustrates the described behavior in your previous post to us.
Looking forward to your answer.
Check out Telerik Analytics, the service which allows developers to discover app usage patterns, analyze user data, log exceptions, solve problems and profile application performance at run time. Watch the videos
and start improving your app based on facts, not hunches.