Making a new one since the other one was closed.
GIF animation link
the embedded GIF seems to not animate, follow the link please.
<img src="https://dl.dropboxusercontent.com/u/23009908/construct_bugs/rightanchorsinebug.gif" border="0">
The object has the Origin set at the Top Right, so, Sine Size should make it grow to the left, correct?
But the opposite happens.
In the export, Sine makes it (wrongly) grow to the right, it doesn't respect two things: the Anchor set to right, and it also doesn't respect the Sine Size growth to the left.
It should grow to the left.
Hope I explained myself.