Charge numbers attached to mortgages and charges changed in April 2013
Mortgages and charges were not kept on the public record at Companies House before January 1987.
The Register of Mortgages and Charges and how to update it
If your company's mortgages are charges were registered before April 2013, they will have been given a single charge number. For example: 1,2,3 etc.
Since April 2013, charge numbers have been changed to include the company number + 000. For example 081238560001.
This is the reason for the differences in your charge numbers.