APIHub query problem for last year

I’m trying to query the APIHub to complete and download the missing Sentinel-1 data products for our archive.
I commit queries including the dates between 2015-01-01 and 2015-12-31 with this url:

https://scihub.copernicus.eu/apihub/search?rows=10000&q=( footprint:“Intersects(POLYGON((16.218 45.79, 22.98 45.79, 22.98 48.61, 16.218 48.61,16.218 45.79)))” ) AND beginPosition:[2015-01-01T00:00:00.000Z TO 2015-12-31T00:00:00.000Z] AND endPosition:[2015-01-01T00:00:00.000Z TO 2015-12-31T00:00:00.000Z]AND (platformname:Sentinel-1 AND producttype:GRD)

I only got 118 results from the end of November and December.
After querying from 2016 January the results are just fine.

Is there any way to reach the older products and batch download the missing products from the APIHub? or the rolling archive in terms of the APIHub means only six month?

All right, changing the /apihub/ path component to /dhus/ solved the problem.