On the off chance anybody is curious, here is the release order for Original Sin(s):
2014-05-07
-ORIGINAL SIN #1
2014-05-14
[No Original Sin(s) issues]
2014-05-21
-ORIGINAL SIN #2
2014-05-28
[No Original Sin(s) issues]
2014-06-04
-ORIGINAL SIN #3
2014-06-11
-ORIGINAL SINS #1
2014-06-18
-ORIGINAL SIN #4
2014-06-25
-ORIGINAL SIN #3.1 [Hulk vs Iron Man]
-ORIGINAL SINS #2
2014-07-02
-ORIGINAL SIN #5
2014-07-09
-ORIGINAL SIN #3.2 [Hulk vs Iron Man]
-ORIGINAL SIN #5.1 [Thor and Loki]
-ORIGINAL SINS #3
2014-07-16
-ORIGINAL SIN #6
2014-07-23
-ORIGINAL SIN #3.3 [Hulk vs Iron Man]
-ORIGINAL SIN #5.2 [Thor and Loki]
-ORIGINAL SINS #4
2014-07-30
[No Original Sin(s) issues]
2014-08-06
-ORIGINAL SIN #3.4 [Hulk vs Iron Man]
-ORIGINAL SIN #5.3 [Thor and Loki]
2014-08-13
-ORIGINAL SIN #7
2014-08-20
-ORIGINAL SIN #5.4 [Thor and Loki]
-ORIGINAL SINS #5
2014-08-27
-ORIGINAL SIN #8
2014-09-03
-ORIGINAL SIN #5.5 [Thor and Loki]
I might have gotten the stories flipped for the 3.x and 5.x issues.
Personally, I think the confusing titling and numbering of these issues is something of an origin sin.
Original Sin(s) release order
Moderator: JohnMayo