Well, it's all based on none-canon stories, theories found in the old threds so it can be disregarded. They just make more sense to me. XD
Storie wise the Wreath/Prey-Pacer Recognition because Prey-Pacer had too much Wolfblood in him and there were a bigger need for more elfblood in future offspring.
And a old theory said that Recognition could misfire in the early days.
Selnac killed herself because she kept Recognizing people but never had any other children besides the one she had with Timmorn.