Some schools use an external grade book beyond what Sapling Learning uses to record your grades. Your teachers have the option of exporting those grades through a variety of settings. A mismatch or the absence of your student ID in your profile may be the cause of an overlooked grade. If necessary, you can edit your Sapling Learning profile to include your student ID.
You may also want to ask your instructor if you are in the wrong section within the Sapling Learning course site, which could cause your instructor to overlook your Sapling Learning grades.