I don't think there's a reason to worry, as mine is a similar situation. Today my Ecas shows my grandmother's application as received and no sign of parent's application. I think they are separately processing the parent's and grandparent's application, due to which grandparent's application is showing up first. And anyways in the invitation letter, we have put 3 sponsors so they should know better@YULIA-2016 Please add
Sponsored people: Parents + GP
Parents country of citizenship: India
Prov: AB
Invitation Received date: April 24, 2019
Application received in ottawa date: May 3, 2019
E-Case status for sponsor: Appl. Received on May 3rd
E-Case status for applicant: Appl. Received on May 3rd
Note: The E-Case only shows my grandparents application. No sign of parents application. Any reason to worry. Both the applications were in the same package.