If the amperage of a charge is reported incorrectly for a charge session this may be due to the Tesla API incorrectly reporting the charging phases. Many third party chargers may report the correct charging amperage but the incorrect charging phases.
This can be corrected by tagging the charging location by clicking on the address in the charging session. From here you can open the advanced section and change the charging phases to '1' or another appropriate setting.
Customer support service by UserEcho