Management Console: hint number connection for quarter of an hour

Hi,

from this image I can see a number of connection in specific quarter of an hour. The hint showed on mouse over contains a number that does not coincide with actionable data via API at a later time. As shown, there are 86 connections between 12:15 and 12:30.

Reworking the data relating to connections of yesterday, it is a higher number of connections. The development planned to consider the fifteen minutes in the range 12:15 to 12:30 and check how many connections provide a start_date / end_date interval compatible.

The result I get is this

2017-02-23 12:15:00.000 152
2017-02-23 12:16:00.000 155
2017-02-23 12:17:00.000 156
2017-02-23 12:18:00.000 155
2017-02-23 12:19:00.000 154
2017-02-23 12:20:00.000 158:

I have two questions about:
- It is possible that the calculation performed can demonstrate a use of sessions beyond the channels actually purchased, or is it my mistake in the derivation of information about connections?

- If the performed calculation is correct, you can implement the hint indicating the relative number at the peak of connections for the time slice?

Thanks in advance for the tips that you will provide me.

Regards