Is this the first time you have read a 13G?
Febuary 8th, 2013 is the "Date of Event Which Requires Filing of this Statement" and 3/13/13 is just the date the 13G was filed. So, the number of shares reported is reported as held as of 2/8/13. If we assume the 13G gives us an end of day number for 2/8/13 and that the daily disclosures provide beginning of day total relative to the "as of" date, then we have a match between the 13Gs 2/8/13 total and the daily disclosures for GDX and GDXJ as of 2/11/13. Both report 40,178,947 shares, thereby confirming that all of the shares held by VE are held in the GDX and GDXJ. Daily disclosures can be found at the VE website.