Getting texts and tables in posts to stay in place

Hi all,
Been having trouble with this since I started but have yet to find a proper solution. Been getting buy but its really annoying me now.
So..
Basically I need the text on my pages to stay in place. I manually move the text around in the ‘Visual’ mode,using the space bar and return button to create spaces and using things like
  to create spaces in the HTML window.
However, this does not always resolve the problem, or it does only temporarily.
  sometimes disappears altogether.

Is there a way at all to get text to stay in place. It seems ridiculous the fact that this is a problem…for something which seems fundamental in a website. I have yet to find this solution and it makes me crazy!

An example of a post on my site can be seen here:
https://www.rerdownloads.com/?p=396
The table comprising the right half of the page keeps squishing as well for some reason and I have to keep manually stretching it back.

Any help from anyone would be greatly appreciated. I have heard something about Div containers..and absolute positioning but not sure I am on the right track. Any help would be great.
Thanks for reading..

Henry