I have never seen this before - but hey there are lots of things I have never seen before:

I was researching a LAX-DUB MR later in the year looking for W inventory. Looking at LAX-ORD-DUB and return. On the outbound I put in a date and got the following for that date:

LAX-ORD AA### W0
ORD-DUB AA92 W0

LAx ORD AA@@@ W2
ORD-DUB AA92 W2

AA92 ORD-DUB on its own is W5.

So it showing differing W inventory on AA92 depending on my connecting flight into ORD! Why should that matter? Is this common? If AA would rather me connect into ORd on AA@@@ instead of AA### isn't it enough to make the W inventory available on that flights accordingly without limiting AA92 W inventory for that connection? And why couldn't I make us eof W inventory on AA92 separately in combination with AA###.

I must admit I am a MR virgin.