Community
1.
Check the project settings:
Isometric dwg settings/annotation/
if the "show end connect annotation on iso" is checked
2.
Well,
the most important thing is how you built the model up. If there is a break in the line, than there will be a break in the ISO as well, and it will be an extra sheet.
You can check the center line continuity by clicking on an item in the line and see the red centerline. If there is a break you have to correct it.
As well you can check this thread: