The F-102 had three bays, left, center, and right. The center bay was modded to take the AIM-26. It could fit two of them one behind the other, or one of them in the forward slot and an AIM-4 in the rear (or vice versa I suppose, but I've only ever seen it the two ways I mention). The AIM-26 mod was basically a widening of the bay by removing the FFAR tubes from the center bay doors, compensating for the wider wingspan of the AIM-26. Amusingly, the F-102A in the USAF Museum, fitted with an AIM-26 in the center bay, does not have the modded doors! With an AIM-26 or two in the center bay, each side bay could still carry two AIM-4s. A total of 6 Falcons was always possible, regardless of the mix of variants fitted. "Two AIM-4s and two AIM-26s" is clearly wrong, as four AIM-4s could still be carried. Vietnam F-102s used to carry one AIM-26B, two AIM-4As, and three AIM-4Ds. A picture of that configuration can be seen in the Squadron/Signal F-102 in action book. I've attached some (resized and cropped) photos of the F-102's weapons bay at the USAF Museum. Can't take any like this anymore, as the jet is now roped off! These were the result of a 2003 trip when the Cold War hangar was being populated, and as a result was about half empty with no irritating ropes. Quality is not awesome, as this was before I got my EOS 30D.
In the F-106, the AIR-2 was fitted between the rear pair of AIM-4s, which actually were placed further outboard from the forward two because of some avionics being in the way. The best photo looking up into a fully loaded Six bay I've seen is in the Detail & Scale volume on the F-106, it shows a full load of four AIM-4s and an AIR-2.
Here's another question-did the F-102 ever actually use the AIM-4E? I can' find any actual evidence that the weapon was employed.