There appears to be an issue with the newest version of Bishop v53 or shot_ready_v006 and the bishop extras that is causing the rig to shrink down and distort when the Character's size is changed in the Bishop Customizer.
Luckily there is a simple fix for the problem. When creating your character, go through each step as you normally would. When you reach "Step 6: Choose Your Character's Size" select the size you want. This will cause the rig to shrink down and any extras, such as clothes, hair, ears, or props to distort wildly. Once this happens simply select the "bish001_ac_C_layout" ring that is around Bishop's feet then go to the channel box. Set the "Uniform Scale" to around 6, which is the default scale for the rig. This will bring Bishop back up to his correct size and all the distorted objects should be back to normal.
We hope this helps and if you have any questions or issues, please feel free to PM Beau or Cameron Pratt and we'll help you any way we can.