Unfortunately, that is incredibly poor and inexcusable advise from a FacRep, much less an RVP. Your situation was unique and a direct violation of section 6 of the MOU.
Section 6. Facility certified CPC’s shall be considered for placement prior to other employees during the ERR placement process. Employees in training that have never achieved CPC status will be considered on a case-by-case basis.
Being a part of this process, NATCA does have incentive to work things out prior to a grievance, but trying to avoid a bona-fide grievance in that manner is inexcusable. Ex. I know of someone who's facility was downgraded prior to an NCEPT panel, but the facility training success rate did not change to mirror the average of their new facility level on the PPT. This resulted in one less person being able to be released. After the panel, he brought it up to his RVP, who agreed, found out he would've been the next person selected out of his facility and got him a TOL to the same place where you were snubbed (previous panel though). This is what an RVP should do prior to the employee filing a grievance.
Sadly, I believe he was simply trying to appease you in hopes of you reaching the 20 calendar days requirement of filing a grievance per Article 9 of the slate book.
Although the 20 days have passed and they can simply reject your grievance and say "No, the 20 days have passed." I would still file it. Worst case scenario, nothing changes for you, best case scenario, you'll be awarded priority consideration outlined in Section 9 of the MOU and Article 100 in the Slate Book. Given the nature of the NCEPT, if granted priority consideration, you would be "ranked" #1 for any facility you apply to for each panel until you're selected. It's worth trying.