Merrill Lynch Online Test

#1

I have completed the first stage of the form for my summer internship application, very easy! Then I was invited for an on-line numerical test. I completed this test ( I only think I got about 12-14 right out of 20)
I was straight away invited to continue with my application in more detail with some questions and so on…

Does this mean there is a pass mark for the numerical and it is assessed as soon as I complete it? Or will my score be taken into consideration with my application I submit (I am worried I did not score above 15 on the test and this may count against me)

#2

I sent my application off however, I forgot to put work experience on it (voluntary, admin work nothing financially relevant)

Shall I call up their graduate application centre and ask to amend my application or will it not make a difference (it is for a summer internship application)