This is a fixable situation and InmateAid handles it without any hassle.
A phone number assigned for one facility will not work correctly for a different jail because the number is calibrated to the specific carrier and rate structure of the facility it was set up for. Your inmate dialing that number from a different jail will not get the intended discount because the number does not correspond to that facility's phone system.
The solution is a replacement number set up for the correct facility, and InmateAid provides that at no charge. Mistakes like this happen regularly and the customer service team is set up to resolve them quickly. You do not need to explain at length or justify the request. Simply email aid@inmateaid.com, let them know which facility your inmate is actually at, and ask for a replacement number calibrated to the correct location.
Once the new number is issued, get it to your inmate through a letter as quickly as possible so they know which number to dial going forward. InmateAid can also provide a notification coupon at no charge for the letter if you need help covering that cost.
The turnaround on replacement numbers is typically fast, so reaching out to aid@inmateaid.com today means the correct number can be in your inmate's hands within about a week once the letter is sent. Do not keep using the wrong number in the meantime, since it will not produce the discount it was intended to generate.