Recent posts not viewing in archive

There seems to be a glitch with my blog when viewing my two most recent blog posts. Firstly although they are displaying on the home page they are not displaying in the categories archives they have been listed in. Also when I click on the posts using either Safari or Firefox they display as the mobile version of my site which is really odd. All other posts appear to be formatted normally. I have checked my blog on my iPad and all appears normal including my recent posts.

I have tried clearing my history and emptying my cache etc but this doesn’t seem to work. I also checked the blog on my father’s computer in a different house and he had the same issues.

Does anyone have a clue what’s happening?!! Your help would be much appreciated!

Thanks

Sharron