Site display resolution and sizing gets corrupted on browser refresh Options

[GoneFishin]

Hi, I just joined the forum this morning and all was fine with our site but now when I visit and refresh my browser the display seems to corrupt. I've read the page about the limitations of Blogger etc and it is based on the Blogger platform so I will try and find some help from them directly. The thing is though we are using a third party theme free version and so there is no support from them.

We've had other teething problems but this one has me flummoxed as I've not changed any settings or been tinkering at all so I have no idea why this should be occurring. I've tried clearing my browser cache but the problem persists and does so with different browsers, on both my laptop and desktop so I think it must be an issue with the site itself.

Can anyone suggest a good starting point for me to try and work out the cause of this issue? Everything has been working fine for months so this is a total head scratcher.