I always use AutoCAD table when I need to create table. You can see that it had the number 1 and then it added 5 to it and it got 6 add the next number to it and got 11 and added the next number to it and got 16. Scoot or the AutoCAD Stretch command to move the existing rungs to their new rung locations.
Numbering is added to individual text objects and to each line of multiline mtext objects.
After you have initiated the command the first thing you will need to do is select the number you want to change IN THE ORDER YOU WANT THEM NUMBERED. The command Auto Number only works for text. Use an object selection method. You can see that it had the number 1 and then it added 5 to it and it got 6 add the next number to it and got 11 and added the next number to it and got 16.