I have had a couple of batches where the indicated number appears to be less than that provided on the images and I cannot seem to access any more pages to complete the required number. This results in a batch not being able to be submitted.
Each batch has a preset number of entries. There may not be that many entries in any particular batch. You can then delete any remaining blank entries by going to the top and clicking on the icon that looks like a trash can. Click on "all blank entries". You can then submit the batch. Also, on occasion, there may not be enough entries provided for the amount of information that you have in the batch. In that case, click on the icon that has a "+" in front of it and you can add as many blanks as you need. Happy indexing !