Receive a small portion on my refund but no EIC or Child Tax credit why?

I would have no way of knowing exactly why the IRS has reduced your refund amount, but I can give information on Tax Topic 151.  You will receive a letter that will give more specific information as to what the issue is, and you will be able to appeal the issue if you feel it is not accurate.  

Here is an explanation of Tax Topic 151-The IRS has an administrative appeals process that works with taxpayers to try to settle tax disputes in an effort to avoid court proceedings. The role of Appeals is to make an independent review of a tax dispute and to consider the positions taken by both the taxpayer and the IRS. The Appeals unit strives to resolve tax disputes in a fair way and remain impartial to both parties.

The IRS will send you a report and/or letter that will explain the proposed adjustments or proposed or taken collection action. The correspondence also tells you of your right to request a conference with an Appeals or Settlement Officer, as well as how to make your request for a conference. In addition to examination adjustments, many other things can be appealed such as penalties, interest, trust fund recovery penalties, offers in compromise, liens, and levies. If you request an Appeals conference, be prepared to support your position with records and documentation.