Covington Examples Sub-list not lining up

I'm trying to use Covington to generate my examples for my thesis, but anywhere I have sub-examples, the (a) and (b) examples don't line up.

Here is my code:

\begin{examples}
    \item \label{ResBack:Sem:Tel:SubInterval} 
    \begin{enumerate}[(a)]
        \item Bill heated the mixture hotter.
        \item Bill hammered the metal flatter.
        \item Penelope wove the shawl longer.
    \end{enumerate}
\end{examples}

And the output looks like this:

I want the sub-list to line up with itself, but can't figure out how to do that from what I've read. Can someone please help me?