VD Check Late Late Adds

Has anyone working VD Check discovered more never-before enumerated units than were given to you by the office? I came across about 30 or so in a subdivision and my CL and CLA came across an apartment complex where only 3 apartments had been enumerated, so there about 330 that need enumeration. The construction on this apartment complex was finished in October of last year, after address canvassing. There are also a couple of other complexes where there were some additions to the complex that need to be enumerated. We're looking about 500 adds. The office wants all of our labeled stuff done by Monday, and I think the plan is for us to then do the new adds after that. What I don't get is how this was missed during NRFU. Anyways, this will extend my job for a week or so, so I'm not complaining.