YOU SAID:
She sat waiting at the train station
INTO JAPANESE
彼女は駅で待って座っていた
BACK INTO ENGLISH
She was waiting at the station, sat
INTO JAPANESE
彼女は座って、駅で待っていた
BACK INTO ENGLISH
She is sitting and waiting at the station
INTO JAPANESE
彼女が座っていると、駅で待っています。
BACK INTO ENGLISH
She is sitting and waiting at the station.
INTO JAPANESE
彼女が座っていると、駅で待っています。
BACK INTO ENGLISH
She is sitting and waiting at the station.
That didn't even make that much sense in English.