I feel that this is being made more confusing than it needs to be.

A segment is a flight between two airports, with the caveat that a direct flight with a stop (ie, both flights have the same flight number) is one segment. This is standard industry-wide and really has nothing to do with AA.

A segment is qualifying if it's either a revenue flight with your AAdvantage account attached (including partner flights) or if it's an AAdvantage award flight operated by AA. There may be one exception -- I'm not sure if partner segments that don't earn LP are qualifying; I suspect that they are not. Some confirmation would be nice here.

I have no clue what is meant by "bonus segment".

Flights being on the same PNR or not is irrelevant. I'm not sure what's even being asked here. Obviously if you have 2 PNRs with 1 segment each, you have 2 segments. And 1 PNR with 2 segments is also 2 segments (because what else would it be??) You need 30 segments, not 30 PNRs.