Thank you so much for your feedback.
These blocks come to us pre-drilled, and the hole is mostly centered. We just checked our current stock, and less than 1% appear to be "off". We apologize if the inventory you ordered from last October was not satisfactory. In the future, if you receive any of our products that you are unhappy with, please let us know or email us photos, etc so that we can make it right with you and review with our suppliers. Let us know if we can be of further assistance.