We've been discussing Silas, but as you have documented in the source confirmation statements that I reviewed, the MRCA pair for that segment is Silas and wife Sarah. Regardless of which ancestral path through which you inherited that DNA, I believe that one of that MRCA pair contributed that segment to all 3 of you.
If the other matches have well-defined trees that show only one ancestral path each back to Silas/Sarah, I would think it would be appropriate for them to confirm the relationships in their lines back to, but not including, the MRCA pair (since we don't know which one of the pair contributed the segment).
The wording of the other matches' confirmation source statements may need to include verbiage that describes the different possible genetic relationships that you may have with them for this segment depending upon which ancestral path provided that segment to you (since Silas/Sarah appear to be both 5g and 6g grandparents to you).