Discrepancy Bewteen FTH Editor and Published Page

The published page at    Bethlehem Toastmasters  keeps changing the format designed in FTH. 

How can I fix this so that what I design is what is published? TIA

When using images and text side by side it is a good idea to use tables (you can make the borders invisible)
Set the widths of tables and images as a percentage rather than pixels, so that they look the same on different devices

Thanks for the quick reply, Pam. Can I have overlapping images like in the screenshot I sent? IE, I want an image on the left to overlap halfway on an image to the right.

Also, Can I format cells independently? EG, on a 2-cell horizontal table, text in the left cell wants to center vertically when I insert an image in the right cell.

Is there a support page for Tables? I did search for table or cell without success in the doc index.

Google is your friend, search for html tables. There are lots of how to docs on the web.