I'm in the \begin{figure*} environment, with a few subfigure objects that have no captions. After \end{subfigure}, I'm currently using
\caption[]{\small\justify blah blah blah}
which produces the following image 
However, if I go to
\caption[]{\small blah blah blah}
after first setting
\usepackage[justification=justified,singlelinecheck=false]{caption}
\usepackage[justification=justified,labelfont=large]{subcaption}
I get

which is what I want except the last line is centered. I want the last line to be as the first picture. Am I missing a really simple command? Thanks.
Total code:
\begin{figure*}
\begin{subfigure}[b]{0.485\textwidth}
\centering
\includegraphics[width=\textwidth]{fig1.eps}
\label{fig:1}
\vspace{-12pt}
\end{subfigure}
\begin{subfigure}[b]{0.485\textwidth}
\centering
\includegraphics[width=\textwidth]{fig2.eps}
\label{fig:2}
\vspace{-12pt}
\end{subfigure}
% \vskip\baselineskip
\begin{subfigure}[b]{0.485\textwidth}
\centering
\includegraphics[width=\textwidth]{fig3.eps}
\label{fig:3}
\end{subfigure}
\begin{subfigure}[b]{0.485\textwidth}
\centering
\includegraphics[width=\textwidth]{fig4.eps}
\label{fig:4}
\end{subfigure}
\vspace{-10pt}
\caption[]{\small\justify blah blah blahblah blah}
\label{fig:plot}
\end{figure*}
