Just last night I discovered that I have two DNA matches from 2 different lines on my tree with the surname Bailie and the more I look at it the more I am convinced that they are somehow related to each other. Just to complicate matters I am also searching for another Mary Cochrane who I believe to be related to this Mary Cochrane!
I see this post of yours is dated March 2019, have you made any progress since then? Hopefully between us we can make some sense of it all!
My tree is on Ancestry, I'm happy to send you an invitation if you could send me your email address.
Looking forward to hearing from you,