I've had problems like this for 30 years or so. It's usually my fault
because of one of the following:
I've typed zero for an 'O' or vice versa
I've typed in lower case or upper case when I should have done the opposite
I've typed the lower case letter 'L' when I should have typed a '1' or vice
I've typed spaces or dashes when they were not supposed to be entered - even
though they appeared in the number I was typing
Hope this helps!