Hello Phil,
Can I know which template you're using?
If you are using sellacious 1.7.3 or older version of sellacious and not sellacious templates, there will be bootstrap compatibility issues. I suggest you use the sellacious templates to avoid these issues.
If the above is not the scenario of your issue, please explain so I can help more.
Thank You
Thankyou for your help, it was the template I was using
It seems some templates work and others not,,,