Rooted G Pad 8.0 LTE, not able to delete system apps from carrier topic

Hi, I just rooted my G Pad 8.0 LTE with purpledrake, installed SuperSU and Titanium Backup and it seems like I have root, but I can't uninstall some system apps from my carrier Orange. Is it normal? It says "failed to locate apk file". I have titanium installed on my Galaxy S3 rooted and I can uninstall any system app I want. I also get a warning when I start Titanium: "the mount namespace separation setting in supersu might not work reliably on some platforms. If you encounter any problems please try changing it" :confused: