I agree with you that SS is different than USSD in mobile terminology, but from a mobile OS perspective, they're exactly the same, the OS needs to send a certain string in the SAME FORMAT over SDCCH. Thus for the developers looking at the second bug report they will close it as duplicate, cause for them it's one problem, sending codes that start with * and end with a # over SDCCH, regardless whether it was structured or unstructured. I hope you agree with me here