Raises have always been "reviewed" yearly and are not set in stone.
The form letter that was posted in Miami is the same one that has shown up at several locations, including the Portland benefits office. This comes up regularly during "good faith" negotiations. A company cannot "withhold regularly scheduled pay increases" which means they cannot keep NMF from getting a regular step increase in their pay. However, once negotiations start, everything has to be negotiated, including unscheduled pay increases or increases to the pay scale. I'm not saying that there was no wrong doing on either part as I don't work there but that's the letter of the law.
NLRB regulations are written as pro-union....by that I mean that a union does not bear the same burden of proof that a company does. A union can do many things that a company cannot without any reprisal. They can promise anything that they want leading up to an election and there is nothing that the NLRB can or will do about it due to how the regulation is written. Once it's posted that there is a specific fine imposed by the NLRB on the company for a specific violation or that there is a specific dollar amount being issued to the employees at NMF, then I'll believe it.