hurricane,
I appreciate your concern in regards to your
situation but try not to panic. Your case will be decided under EU laws than the tougher immigration rules (IR's) - you have more than enough money/ income per month to satisfy the visa officer you are not going to be a public charge even under EU laws. As a bare minimum operational guide lines expect applicants in the case of the IR's to be above certain thresholds usually linked to social security benefits for the stated family size. That for a single person is aroun 55 pounds a week.
I would direct you to focus your efforts in obtaining the documentation required - I suspect the visa officer wants to verify the identity of your dependents...what documents did you submit in regards to this? This is a standard procedure where there have been 'immigration complications' for the dependents in the relevant members state in this case Holland.