I have executed your program in a real setup. My observations are:
1. While entering 10-digit number (any combination of 0 to 9), the program also responses to C, D, and etc. Is this correct?
2. After 10-digit entry (say, 1, 2, 3, 4, ..., 9, 0), I pressed '#' to save the number in EEPROM. It looks like that some kind of action has been taken; but, there is no message/indication on the issue that the number has been saved in EEPROM. Anyway, I have assumed that the number is saved.
3. I pressed 'B' with a hope to see the number back on LCD; the number has not appeared.
I think that we need to draw the Flow Chart first that will clearly describe your program requirements. Flow Chart is a great Tool in the development of Complex Program as it provides the 'Basic Start up' onto which we can slowly add other features.
Thanks a lot for the good works that you have done so far.