Originally it was a flat out denial IIRC. The sudden recent mention of who cares is what raised a red flag for me, it didn't seem consistent with the original statement at all.
I could be wrong, but honestly, "who cares who did it" is a fishy enough govenrment response that it's hardly any wonder the Russians are being looked at funny.
No. That's been consistent with their response since the DNCLeaks.