This is his way of not throwing Carmichael under the bus. I'm sure in a perfect world he would have liked to allow Pete the freedom to make all the decisions and be a minor league version of Sean. He just hasn't been and Allen has to ride this out.
My pet theory is that maybe management wanted Graham signed and to have a spot on the 53 against a reluctant DA’s wishes, and he kept him inactive out of protest until someone and/or recent player injuries forced his hand.