Thank you, solve my problems too. No need to restart. I delete XLCamera, then open App Store. The updates tab now clear from MotionX GPS update.
I get this problems after update iOS version from 5.0.1 to 6.1. In iOS 5.0.1, there are no problems with XLCamera Universal.
I suspect that this problems is specific for iOS 6.x. Let's notify the app maker and Apple about this.
I don't mind deleting XLCamera because I never use it, but it wil be annoying for those who need the app and will be disaster for the app developer. This problems could also happened to other apps if not get fixed by Apple.
I just bought a new iPod touch and installed apps on it. Without thinking I installed the XL Camera app and then the Motion X app showed up in the updates. So I deleted it and it disappeared. I didn't have to reset. So I decided to try my iPad again, I did a search and realized I still had a XL Camera on it. I must of deleted the wrong one or so I deleted it, but I did have to do a restart. My problem is solved too. Thank you for the solution.