While I was doing my thing in NB, and when I just opened the map of Sirius to check out something, I saw this weird thing -->:
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*snickers*
This is something that has been there since those CF
systems were introduced. In the part of the map where
Sol is, every other system in DK space and Altair is also
stacked atop. If you move your cursor around you can
select any of the systems beyond Sol that you've
visited - usually though it's hard to move the cursor in
such tiny amounts and so it's just easier to click on one
and then follow the jump holes. xD