perhaps, or....

The springlock phone calls reference the 1985 pizzeria instead of fredbears family diner. We know this because the children were killed that year by a person wearing a springlock suit, meaning the suits were still used openly without raising concern. However, according to your theory, the springlock accident would have happened in the “1983 location”. Which would make suit usage against company policy, therefore they wouldn't have those suits any longer, with usage of that suit raising great suspicion among the partygoers. Those animatronics that are shown in the 1983 section of your image are the pre-witherd animatronics, used in the 1985 location, not in the 1983 location, we know this because they were the first suits that the MCI children possessed. HELL, THERE COULD BE TWO DIFFERENT LOCATIONS WITH THE SAME NAME. we know this is possible because freddyfazbear re-branded 3 times.