CnC reinforcements do seem to be a bit off in 1.7.2. I just had an example of calling in the second Armada CnC DN, than I wasn't able to call off the first. The icon was greyed out at both of them. I did just board an enemy ship if that can have anything to do with it (as it followed the first CnC DN I was trying to pull out).
ErinysSolForce Intelligence has great difficulty penetrating Liir society to that depth, for obvious reasons. fibioLack of scuba gear?