YOU SAID:
I was going through a transaction while the people behind me were waiting patiently
INTO JAPANESE
後ろの人が辛抱強く待っている間に取引をしていました
BACK INTO ENGLISH
I was trading while the person behind me was waiting patiently
INTO JAPANESE
後ろの人が辛抱強く待っている間に取引していた
BACK INTO ENGLISH
I was trading while the person behind me was waiting patiently
That didn't even make that much sense in English.