If you could, you cannot now in NX8 - I can't do it. Without being able to work on the same file you are, it's going to be a bit difficult to diagnose any possible issue or solution.
Have you tried recreating the GD&T frame? Are you placing a new datum feature symbol or editing the origin/reassociating an existing datum feature symbol? If you're doing either of the last 2, have you tried placing a new datum feature symbol?
Tim Flater
NX Designer
NX 8.0.3.4
Win7 Pro x64 SP1
Intel Xeon 2.53 GHz 6GB RAM
NVIDIA Quadro 4000 2GB