Did you interview with a professor or got an invite for the grad week? If yes, then it could be a spoiler.
I attended Wake Forest grad recruitment weekend (still going on). In one of the presentations (by the graduate admissions director) it was mentioned that VT might even send informal admits before grad week (I know its confusing).
Nonetheless, you should contact Graduate Admissions Coordinator stating the confusion, that will clear out everything. All the Best!