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Unstable Projection? Data not lining up, why?

Question asked by jrlalessi on Mar 26, 2019
Latest reply on Apr 2, 2019 by jrlalessi

I have several FDS that are set to Nad State Plane South (WKID: 2253) that I want to project to WGS 84 WEb Mercator (WKID: 3857). I have been using the NAD_1983_to_WGS_1984_5 transformation. This was working for a while but now my WGS datasets are drawing about 3 feet off of where the points were. I didn't change any of the parameters in my GP tool. I can run the Projection in catalog, pull the FC into an MXD with Imagery and they are fine, but once I save the map and reopen it the imagery and FC no longer align. The imagery and the FC are the same Coordinate system. Please help!