SAT

No, the SAT syllabus does not change overnight. Before changes in SAT's syllabus are announced, there is a proper detailed information available at the College Board website. Usually, the website would also share mock test sources and update of the changes made. Before SAT Digital came into play, the syllabus was changed and was announced two months prior to the first exam date for international students. Hence, students should not worry about the syllabus getting changed at last minute. In case the changes are expected, then they are proposed 2-3 months before so that the preparation of the applicant is not affected by the changes. 

There is no comparison between the difficulty level of SAT syllabus and ACT syllabus. Both are standardised tests which test undergraduate students on their previous knowledge of high school across various subjects. There are a lot of differences between ACT and SAT but they both solve the same purpose for abroad university admissions at the undergraduate level. SAT syllabus is majorly focussed on testing the applicants based on their logical skills while ACT syllabus tests the applicants' verbal ability and logical reasoning. SAT syllabus includes reading plus writing and Maths whereas, ACT syllabus includes English, Maths and Science also which can be slightly more challenging than SAT syllabus. 

Probably the money paid for SAT registration was processed and is no longer available for recovery. However, it is possible that the registration process is still ongoing and the applicant's payment has not been fully processed. It is recommended that the applicants go and check the status of their registration and contact College Board that administers the SAT for further assistance. College Board may be able to the student with information about the status of their payment and registration. Also if the SAT fee is deducted from the bank, it is likely that the bank credits the amount back in 2-3 working days also. Thus, applicants just need to check. 

Yes, SAT exam dates are predetermined by College Board, thus, when applicants are applying for SAT exam they can see only two or three test dates. Out of these two or three test dates, applicants have to choose any one of the test dates. The SAT dates are official on the website while registering and are not subject to change. All details selected pertaining to SAT dates and centres are incorrigible at a later stage post submission. Also, there is rare chance of SAT dates getting changed or altered, thus, if any such thing happens, students will be informed way before the exam is conducated. Plus alternative options will also be provided.