You should be able to accomplish this with a single upload server behavior and a single file field on our form. It looks as though the screen shot for the upload is setup correctly. You will want to specify the name and size of the resized image in here. This should get the image uploading with the new name. Are you getting the thumbnail image uploaded?
You will need to first confirm that the image is uploaded, once you do that then you can update the insert server behavior. For the image field in your table you will use the server file name for the full size image, for the thumbnail field in your db you will want to use the server file name for the resized thumbnail image.
You should then be able to see the image on any page with a recordset that selects from these records in your db. Please describe a little about what you are currently experiencing versus what you are hoping to accomplish and include the pages in question so that we have a better understanding.