5.2) I want to upgrade to the Brain Rook level but my Brain Knight (or Bishop) membership has not expired yet. What would happen to the rest of my current level?

When you purchase a higher membership level but you already have another level of a paid membership (for instance, you buy a Brain Rook but your Brain Knight level expires in 2 months), BrainKing saves your new subscription (and shows it at your Profile page) to be automatically activated when your current level expires. If you want to active the new level immediately, please send a request to the administrators and the remaining part of your current membership will be used to extend the new level by a reasonable number of days or months.