Posts title overlay text and images

You’ve got some markup errors that might be causing this. Try to get those straightened out first– especially the “unclosed p” ones. Until you do that the CSS/layout is going to be unpredictable.

Thanks for that. I have gone to validate my site and have found seen the errors but I really cant understand where I go about finding them to fix them? I thought wordpress is not using HTML?

All web pages uses HTML. WordPress uses PHP and the database to generate HTML pages.

https://codex.www.ads-software.com/Validating_a_Website

the aligned images seem to be part of the problem:
try to add something like this to style.css of your theme, possibly at the end:

#entry_content h2 { clear:both; }

wowsers! that seemed to have worked a treat. Thanks so much.