This is most likely occurring because your league is shown in My Playbook as a head-to-head league. To change your league from head-to-head to roto, do the following:
1. Click on Manage My Teams
2. Click on Edit Settings for your league
3. Change the Head-to-Head scoring option to Roto
4. Click on Save Settings
Note that this cannot be done on the app, so launch the web version of our My Playbook tool to do it, which can be done at www.fantasypros.com.