I've heard lots ticks in my bow making life. Sometimes, like you, Trenton, they are on the edge and I just draw knifed it away; sometimes they indicated a crack on the back. Sometimes they indicated a chrysal on the belly.
But I never had one while floor tillering. You may be forcing it to bend.
Anyway, c racks have to be discovered and dealt with.
That board looks good.
Jawge