Please raise a support ticket for the same

It looks like there are 2 authentications available. do you have some custom authentication handler(s) ? 

You need to have a resourceType to support the TouchUIrefer [1] to see how to create touch UI component[1] https://helpx.adobe.com/experience-manager/using/creating-touchui-component.html

what is error that you are seeing ?? Also JDK 1.8 might have some issue and best supported with JDK 1.7

this is part of clientcontext which is used for personalization or segmentation. If you are not using this in your blog, remove the clientcontext include from the blog template and you should not see this

oh yes !! sorry for the confusion.'Members' are the one who drives the permissions rather 'Groups'. By default 'everyone' will be part of all the groups

@opkar, so that gives the permission to that group for everyone right which should not be the case.We create different groups so that everyone would not get that permissions 

Yes.. thats looks like a bug. Please raise a support ticket for the same.

CQ_Analytics is nothing to do with Google Analytics unless you have configured explicity for Google Analytics (using GA javascript in your pages)

CQ_Analytics holds lot of objects with it which is used in AEM. refer [1] on the same. any reason for disabling the same ?[1] https://docs.adobe.com/docs/en/aem/6-1/develop/personalization/ccjsapi.html#Methods