A user, jidanni, noticed that internal links in the preview screen do not always reflect the exact URL. They provided screenshots of links A, B, and C, showing the discrepancy. Moin reported not experiencing the issue, but jidanni suspected a caching problem. merefield confirmed that the preview does cache links. jidanni further observed that oneboxes also appear with errors, which resolve upon posting. They proposed adding a Refresh Button to the preview window as a solution.
So maybe it is also a caching issue.
If you slice and dice them, do they always fully update in the right. Or just stay the way they were when you first pasted them in?