overlapping titles, some pages really bad; how to delete page titles alltogether

Site URL: https://www.omsystemretreats.com/

I have overlaping titles 

Looks like a Site title overlaps AND a second title (and I am not sure where the bog one is even coming from and I don't need/want two. I tried to edit design and remove the top OM SYSTEM Retreats, and I tried to remove them. I do not need page titles on each page.

I have looked and I do not even see a place that says "previous photography retreats" anywhere !?!? In this case the page itself is called photography retreats.

Please help, I am not great with websites and really need to get this fixed.

Thank you!

Squarespace adds padding to the first section of each page to match the header and prevent this type of overlap, but it looks like you've added CSS that overrides this and has caused the problem:

Thank you Ziggy. I wish I knew how that got added to each page, or how to delete it, but do not know. 

I do not even know how those titles exist, as they are not the page titles, so that data has to be somewhere. Is there a place to make page titles not visible?

Ziggy, I went to the previous retreats page and found the place where code could have been entered, but none there. 

OK, this issue has been soooo frustrating that I just did a reset styles, heeded the warning, knew I would loose other customizations, but those titles are still there 😞 

I don't need those titles to appear at all, not even sure where they are coming from as they are not even the page titles.

The problem code is likely in Custom CSS.