Due to "high usage" Tesla lowered my charge limit from 90% to 80%, so I set it back to 90% and went shopping. When I thought the app showed 90%, I walked back to disconnect; but I misread the 80%. I didn't know because I just unplugged my car upon arrival; when I opened the door, I saw it was really at 83%. So I re-plugged & re-set the limit to 90% two seconds before electrons started to flow. Then my car changed my limit down to 80% (stating "high-usage" despite 2 available chargers), which was lower than my 83% SOC, so my car disconnected. Did all that twice. During that time, I never moved my car. Drivers in this case should be allowed to continue their original charging to 90%. There were 2 available chargers. Nobody with an 80% SOC goes to a Supercharger, so that line of code (if SOC > 80% then disconnect) should be removed; or at least add more logic to it: 1) is there at least 1 available charger? 2) are there Teslas with SOC < 35% waiting nearby? Tesla knows the answers to those, so please improve this inconvenience. Thanks!