Lost commercial land use because property sat vacant?

[John Matthew Johnston]

We bought a house last year, a commercial duplex with a 1500 sft attached garage. Apparently because it's a residential neighborhood and the property sat vacant for over a year it reverts back to a residential land use. Its not a deal killer because I've turned it into a SFH but I did like the commercial title because it gave me more options for the property. Should've my realtor caught this? Can I petition to hold it as a commercial property because I bought it as a commercial property ?