I had always thought it didn't matter - as is the rule. However, I had someone say otherwise - and now I'm over-thinking it.
Then with the CR running for a CR sounded more like a substitution - b/c the first CR is for F2, but the 2nd CR is now for a CR.
CR11 - F2 singles and is replaced by a courtesy runner. B2 walks. Before the next pitch, the CR is replaced by another CR.
Am I getting myself into "that" trap? - stop me before this goes on for 4 pages!!
edit to add: bob's post submitted while I was typing...