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Garmin 2595 When loading BC Route to Device it brings in extra old way points to the device that are from other routes which are not in BC or on the Device

Need Help Guys, I've been successfully making custom Routes for many years with my Garmin LMT2595 GPS, After some Software updates it appears I now have issues.  Using  Windows 11.1 OS PC, Garmin BaseCamp (BC) Version 4.7.5, Map: 2015.30, 

Symptom:  With the Device clear of ALL Routes and Way points (WP), and BC clear of all routes and WPs except for the route to be loaded to the device (also Tried several old routes that worked great in the past) When I load the route from BC to the Devices External Memory Card (8GB Micro) via BC, then disconnect the Device from BC and now power up the device to check the route install, the device Trip Planner looks correct but the saved WPs is flooded with many many extra WPs from old routes that are not on the device Nor are they on BC.  These extra WPs were from older maps I made in the past.  How are they getting on the device?.     I tried everything, I've learned alot over the years with this unit and its' quirks, looks to me like there is a corrupted file on the device that is somehow combining some of the internal history or user data that you can Not clear via device buttons.   appreciate any help

Additional Note:I have 2 LapTops, 2 cables and 2 Garmin 2595s with different maps and BC versions that were working great until the update and now I'm having the issues on both LapTops and Devices   Both devices appear corrupted    The devices never gave me this trouble until the recent upgrade to the device and BC