麻煩大家幫我睇下我的英文文法有冇錯

There are $500 overpaid have been made to youlast month since we have received your leave application form Human Resource after the cut off dayof March payroll.So that the overpaid was deducted from April salary.

A $500 overpayment was made to you last month because we received your leave application from Human Resources after the cut off date of the March payroll. As a correction, the overpayment was deducted from your April salary.

Since we have not yet received your personal record form before the cut off day of April,so that your April salary is not includedin our April payroll.Your April salary will be paid together with May salary on31/05.

Since we did not receive your personal record form before the April cut off date, your April salary was not included in our April payroll. Your April salary will be paid to you together with your May salary on 31/05.

1. A reduction of $500 had been made from your April salary, which was overpaid to you last month by a failure to receive your leave application form from our Human Resources Department before the payroll cut-off day of April,2011.

2. On 31 May 2011, your salary of April and May will be paid together to you because we did not receive your personal record form before the payroll cut-off day of April.