Increasing Dates

\documentclass[10p]{article}
\usepackage[calc,datesep=/]{datetime2}

\DTMsavedate{ShootDate}{2016-05-20}
\newcommand{\PaymentTurnAroundDays}{45}

\newcount\daycount
\newcommand{\dueDate}[1]{%
    \DTMsaveddateoffsettojulianday{ShootDate}{#1}\daycount
    \DTMsavejulianday{ShootDate}{\number\daycount}
    \DTMusedate{ShootDate}
 }

\begin{document}

Payment will be made by \dueDate{\PaymentTurnAroundDays} (within {\PaymentTurnAroundDays} of the day of the event(s)).

Payment will be made by \dueDate{\PaymentTurnAroundDays} (within {\PaymentTurnAroundDays} of the day of the event(s)).

I want the dates above to be the same.

\end{document}