My husband and I have been gradually improving our credit since we will be moving and need to purchase a new home and mortgage. We have raised our scores in the past 6 months from a 520 to 640 and were quite proud. However, our Fico 5 score is sitting at 580 and hasnt changed. Even with score watch, our Fico 8 changes and has been increasing 1-2 pts… but Fico 5 seems to be stuck and hasnt moved as other scores increased.. is their scoring different for Fico 5? How do we raise this particular version?