Unable to add, update and save new worksheets

Hi. I am having trouble.  Not really sure how to word this but here it goes.....

I began a workbook yesterday and everything seems fine. Today I needed to add 4 new tabs with information that could be displayed on the master sheet but for some reason when I update the values for the new sheets that were added they are nowhere to be found. Please tell me what I am doing wrong or what I should do? The workbook is not protected however it is shared. could that be a cause?