Jason, don't change the property of the field of the source database.
Click the button "Property Sheet" while highlighting the Rich Texbox control. Under "Data" tab, first item "Control Source", select "CONSULT". Then go back to form view, you should see the correct format now.
Warning: DO NOT attempt to modify the data in this box, use this for viewing purpose only - Under the same "Data" tab, changed "Locked" to "Yes". If you type in this box, the Rich Textbox Control will add codes to the original data and mess up your data. Rich Textbox Control and Blob are not completely compatible with each other.