Neither one is needed. If anything SAT1 may be more useful for merit aid purposs if getting a higher score, but it may not worth the extra $42. It is up to you if you want to waste half a day and/or some money.
It is up to you to self report any test scores. For some schools, they do not need your official score report until you are matriculated. In that case, you should self report your test scores. For some schools that requires all scores but offer to accept self report of additional test for financial reason, then it is the place for you to report the other scores.
For the additional qualification thing, it is rare. For instance, you may have received a certification or diploma in something outside of your school that it is not listed on your transcript.
For course and grades, basically it is a self reporting transcript. Just copy the courses and grades from your transcript from all grades they want.
If there is/are supplemental question(s) required for a school, you have to answer those before the submission. When you are done, you hit the button to "Review and submit" then follow the instruction.
Are you an international student? It seems you have trouble in following the instructions.
As long as you have a previous score submitted and qualified for EA, they will look at your October ACT score received after Nov 1. Unless the rest of your application is way off, they would not finish reviewing your application before mid November.