[Zubersoft]

Did you rotate your tablet between making those annotations? That changes the scaling of the page that you are writing on. The annotations are created based upon the current scaling of the page. If you then rotate the tablet, or zoom in, or perform any other action that changes the page size, they will scale up or down to match the original size of the page when they were created. This is done so that your annotations keep their relative size on the page.