This is a strange issue that you are observing and we will need more details about your project so we can provide you with a solution. First of all tell us more about your project - what set up are you using - database, server, NLB, cloud hosting. Any piece of information will help us. Please send us your Error.log file so we can inspect the errors. It is located under App_Data\Sitefinity\Logs
If possible create an administrator backend user for us we can check what is going on with the blogs.
As a last option consider sending us your project so we can debug the problem locally if it is reproducible on local environment.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items