I downloaded the html file from your link and directly opened in Mogan at my home computer installed with Mogan 1.1.4. In the afternoon I had done to open my html file in Mogan 1.2.0beta2 in my office computer, which had not responded.
So, from my home computer I got the following, which has left aligned equations without any equation numbering. The snapshot is attached below::
With regards,
Dr. A.K. Singhj