So apparently this WASN'T a glitch guys... but you can STILL DO IT to get that LR VEGETO to SA 10!!  See below!

"Dear Players, Currently, an issue was found in Stage 1 "Miraculous Fusion" on Z-HARD Difficulty in the Dokkan Event "Supreme Fusion! Blazing Potara". The character information of the drop reward character, [Overflowing Power] Vegito [SSR], was found to be incomplete. This issue will be fixed shortly. The purpose of the release of this character is to help players level up the Super Attack of [Determined Fusion] Vegito who can be Dokkan Awakened into an LR. However, the drop information wasn't mentioned in the Event announcement. All players will receive 1 Dragon Stone as compensation for the said issue. * The compensation will be sent directly to your Gift box. We truly apologize for the confusion caused, and thank you for your understanding and patience. We hope you continue to enjoy playing Dragon Ball Z Dokkan Battle."