Disappearing Values from fields

I am now at my wits end with this. It seems to happen without warning and I cannot work out why. I re-arrange some fields and build the application. At times the fields loose their values. The data is correct in the database just that they don't show up. I reset the page repeat all the work again and all is fine. What is getting to me is that even if I delete the field and insert it again it still does not work unless I reset the page. Currently I am spending a lot of time repeating work.
It seems to happen on the edit and add screens where I re-arrange the table to display the data how I want it by adding , merging and removing cells etc. Nothing drastic just simply moving some fields around. The fields that fail to work are random once the CompanyID, Address field, then Company Name and SSN field and last time the work telephone number. These fields are not all in the same table I hasten to add. I'm getting to the point that I may just use this product (PHPrunner) for doing the list screens and hand code the edit and add screens. But that defeats the whole purpose of buying the product. Still I do like it.