The exams FBT, FMA and FMA are same as BT, MA and FA. The later ones are used as codes if you’ve entered ACCA without the FIA route.
Your sequence is correct. Within FIA, exams can be taken in any sequence. I did mine as MA1, then MA2 and then FMA for management accounting exams as the knowledge gained in earlier exams is accumulated and helps in revision. Same can be applied for FA1, FA2 and FFA.