Hi Twinsnakes - your object looks fine, this looks like a bug in the display mesher.

The export mesher seems to handle it fine, so if you export your object to an .obj file for example, there is no messed up area there. This is because the export mesher does some extra work to do a cleaner job than the display mesher. The display mesher takes more shortcuts so that it is quick.

It may take me a while to get in there and fix this problem, but in the meantime you should be able to just ignore this display error if it doesn't interfere with your actual file data export.

- Michael