<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by YOWkid:
Ok, here's the scenario using Ticket A and B to demonstrate what I would be doing:
A: YOWLHR Jan
B: LHRYOW Mar
B: YOWLHR Apr
A: LHRYOW Jun
I guess that's level 1 nesting?</font>
This is considered as back to back
but AC is only concerned if you are using it to by pass Saturday night stays or other minimum stay requirement.
In your case, even if you buy 2 seperate tickets, complete one before another, you would still be buying 2 seat sale tickets.
As long as you fly all segments, I assure you that you won't run into any problems.