SP2 installed on SharePoint 2010 server/ but getting status as Missing/Required in Patch Status page

Hi All

I have a SharePoint 2010 server, on which SP2 has been installed  a year back after running Wizard. Today when i saw the

SystemSettings -> Manage Servers in this farm -> i see Data base status as "No Action required", but WFE status as Installation required.

When clicked on Installation required -> it is showing for SharePoint products as 

Please suggest - why this is coming so and what to be done to fix this issue.

From the error log from SP2 install - > i see that upgrade is successful with errors. and the errors are like "Missing feature in content database" 

I ended up here as i encountered initially another issue. 

My QA server is having .usage files logged in 14\logs folder but not getting deleted as expected. But this is not happening with Production.

I came across below blog

https://social.technet.microsoft.com/Forums/office/en-US/e8af5657-7ca4-4ae7-bbe8-9609bb341ca8/usage-data-import-job?forum=sharepointgeneralprevious

after which i verified kb2775511 if it is installed in QA and Prod. It is installed in both the servers. But in production the .usage logs gets deleted as expected where as in QA they are not getting deleted.

Any help appreciated to fix the above listed issues. 

Thanks in advance

Usha