I have the free account version 20.0.1 build 2647 on iPhone. I have downloaded a 1903 Dahlonega, Georgia map from USGS Historical Topographic Map Explorer, but when I try to pull up that 1930 map, it pulls up a 1980s map from the same area. Does my account not allow maps that old? I have also tried this on an Android, and the same. Thank you for any insight.
The historical map is probably using time animation. You may need to adjust the time slider to the appropriate period or select "disable time animation" when creating your map. If this does not apply in your case, then sharing a bit more information on how you created your map would help in providing solutions.