I don't think we should worry that much. In the instructions, it just lists 6/15 documentation for things to submit under initial evidence 1.b.6 even though on the site and on the first page it states that you should be present in US when submitting/requesting DACA. I sent in something documenting around July too, but, it should suffice, I think. I guess they just don't want you to be leaving or be out of the country while they grant you this (after you submit your stuff). I don't know why, but I guess it has to do with their re-entry bar rule for overstaying or staying without permission in the US. It's just to make it consistent with the current laws, I think, though they will overlook short "innocent" leaves from the past. http://www.uscis.gov/USCIS/files/form/i-821dinstr.pdf