Report API - days range across month boundary (no replies)

Hi there,

I'm doing a lot of work against the reporting API and this morning I noticed some strange behavior on a couple of the APIs.

This is happening on a number of different methods, but this for example:

method=Referrers.getReferrerType&idSite=1&period=range&date=2014-07-01,2014-07-07
Outputs:
[{"label":"Search Engines","nb_visits":24 ... ... ... }]

When I move the first date in the range back to the last day of the month prior
method=Referrers.getReferrerType&idSite=1&period=range&date=2014-06-30,2014-07-07
Outputs:
[{"label":"Search Engines","nb_visits":1 ... ... ... }]

The number of visits is less by expanding the range to include another day??

Is my interpretation of what range does incorrect? I assumed it would aggregate that data across all of the days in that range, but for some reason once the range crosses into a previous month it aggregates it incorrectly. This is happening on a number of API methods in this scenario.

Anybody else come across this?

EDIT: After some experimentation it's only happening on one of two sites I have registered. Id 1. The other site, id 2 is behaving normally... more puzzled by that

Thanks!

Chris