I have finished indexing a record two pages.

Once you have indexed all the entries on your image, you need to delete the remaining unused, preset entry forms. To do this, click on the trash can icon, select "all blank entries", click delete. Now Submit Batch will appear on your last entry form and you will be able to submit the batch.

The unused forms must be blank, so if you auto filled anything, like a date, place, etc., you have to remove that information. You can make the first unused entry blank and then copy that forward too - same effect as a completely bare entry form.