To be clear, you have an end-of-season save in the com.perveteer.tftuv directory ("Season_1" or "Season 1" followed by a string of alphanumeric characters) and copied it to the season 2 directory (com.perveteer.tftuv2)?
That end of season save is vital, because it gets imported into Season 2 when you first start playing. It's needed because it carries over all the choices you've made in the previous season. The need to have separate apps is partly to work around the 2GB file limit for applications on Android.