Hi Brando,
It is not a problem on my iPod to generate a form with totals for each day. I think keeping it simple will serve you best, however. I would set up my document with a report table on another tab to collect my daily totals.
FYI, I went back and recreated your original table with only one header row and A1 blank- no problem generating a form. So I am unclear as to why you are having difficulty. It may be some residual from merging/unmerging cells. Merging cells is never a good idea in Numbers unless it is a purely informational table and you will never be extracting info.
I want to encourage you to rethink your setup. You may be planning on having a separate tab for each month. Numbers works very well with a primary data table and then various report tables for different days, weeks, months; you could even extract data based on the exercise. This will be much more difficult if you need to look in different tabs to gather, say, yearly totals. I would create a single table for my data entry. Instead of Day 1 Day 2, etc. I would be using dates (if you select the month and move on Numbers enters the current day of the month).
quinn