latex plugin editing problem

When I edit an array markup into latex plugin it requires the use of the "&" character to separate column entries. It saves and renders okay, but when I go back to edit the equation it puts the string "amp;" in addition to the "&" character in the formula that I have to edit out by hand.

\left[
\begin{array}{rcl}
1, & 2, & 3\\
x, & y, & z\\
f(x), & f(y), & f(z)\\
\end{array}
\right]

so after I save the page, then go back to edit latex plugin content, the formula becomes

\left[
\begin{array}{rcl}
1, &'amp;'2, &'amp;' 3\\
x, &'amp;' y, &'amp;'z\\
f(x), &'amp;' f(y), &'amp;' f(z)\\
\end{array}
\right]

I need to manually take out all the "amp;" strings before saving the markup.