im sorry but i did not mean to make you worried...it should be mostly related to job verification....if your a11.2(eligibility) is met then you should not be worried at all....because your job verification is already done...
whenever the officer is not satisfied with a particular document you have provided, it might trigger additional verification..usually it has to do with job but as redd456 correctly pointed out...it might be something else...
hope this helps!
no need to be sorry, You have helped me spot a potential problem, I should say thank you