As far as i know redeem option is avaliable if you are not dark. I played light SI before and did it, but now i cant ("too dark", though i have +2k LS above zero, i am Neutral SI).

I am not sure why this happend, i know that you can bring them peace as Neutral too.

The only explanation i have is that i binded first ghost (the one calling you snake), but made contracts with others. Did that choice really made such impact that i cant redeem them now, lol?