Why is the OSCE involved in Afghan matters?

I just saw this press release of the OSCE.

Why does the OSCE need to engage in the training of Afghan custom officers? Isn't there enough to do within the member states of the OSCE, ranging from the ever continuing Russian-Georgian conflict and other frozen conflicts like the one in Nagorno-Karabakh, close-to-fraud elections, and unclear definitions of the actual goals of the organisation?

I saw in the press release that these are extra-budgetary activities, but it still means that the OSCE administrative body is involved in these Afghanistan-related activities, that time will be spent on the diplomatic level to discuss these things, and that this will distract from more important intra-OSCE questions.

If you ask me, the OSCE should not involve in Afghan matters, not even the training of their custom officials!