You didn't specify how long you want to protect the Full backup, but it should be for a slightly longer time than the Incremental cycle, since INcremental backups depend on having a Full, protected backup
I might be more inclined to use 'Days' instead of Weeks, that is, to protect your incrementals for 15 days instead of 2 weeks
Make sure that you are running the Full and Incremental Backups from the same backup specification. The Backup type and Protection can be set in the Schedules tab