I'm new to Maplex and to Key Numbering. I am working with the 10.1 Prerelease. When I did some Key Numbering with some islands in the Caribbean, I find some full labels may interfere with the key numbers. In the example, 2,3,4 are between the words Sint Maarten. The 2,3,4 numbers seem to run into each other too. Also the Saint Vincent label runs into the 9. Am I just overlooking a setting which would space the numbers better?
Key numbering is new at 10.1 and we are still ironing out a few issues. We have seen and fixed an issue where key number lists were overlapping labels, so hopefully your problem will be resolved in 10.1 final. If not, you can submit a support request to your local distributor or to ESRI Support Services and we'll investigate the issue for you. http://support.esri.com/en/