I don't know the answers regarding reversal submissions, but the way I have used them are as follows:
- A guilotine reversal from single leg is unique and a different reversal for that of a double leg. They are listed out separately, so I just assumed they were different
- You can get the guilotine reversal from sprawl when the opponent tries the escaping to over/under clinch
- you can get the choke reversal from standing clinch to single leg
- I DO NOT believe you can get the guilotine reversal from single leg from side control as that itself is a reversal. In other words, I don't think you can reverse a reversal... But I could be wrong here