Sounds a bit like a browser cache issue. Try flushing it and other temporary data. On firefox that would be ctrl + shift + delete (Note, not ctrl alt del...) or on most browsers try F5 or shift F5 or ctrl F5 depending on the browser to flush for just the current page. Flushing the complete cache is a good idea now and again and also bin all your cookies which build up though you will have to log in again when you next visit.
About a page click in 10 I get a timeout or page inaccessible or something like that. When posting a large image I can get it more often so I post again and then half the time it double posts in that case... If you run a long ping to the site it gets occasionally corrupted at a point near the end - in Texas I think from memory.