The weird thing about that screen is that you can manually change it via forms view, but make extra-sure TT isn't saving you from a mistake. The way the help screen was written, I thought there was a bug that was preventing my correction from having an effect when TT was saving me from the mistake. (I researched it on the CA FTB site to make sure.)
TT should already be taking into account the loan origination date you provided - start by double checking you entered that correctly.
