Master list of one coupon multiple segments for OW
 

Is there a master list? I saw one (not current) for AA. is there one for oneworld?

You are basically asking for a list of all single flight number thru-flights in OW? That's a massive list. That can change a lot with schedule changes.

Not sure if this is something easy to compile or not.

There are a number that are mostly static, such as the BA and QF 2 sector flights, as well as a number of CX flights that route through TPE to/from Korea/Japan or BKK-SIN.

Otherwise, AA has a lot of these, but they are not static, the flights and numbers used change all the time.

AA109 that i saw was an interesting one.

CX has a lot of HKG XXX YYY. i cant figure out if there is anything XXX HKG YYY yet.

LA has JFK LIM SCL, i believe.

is there any way to compile it?

I've never seen one in my 20 years of following them.

Not really.
Other then the 2 sector flights operated by QF, BA, CX and LA, which have mostly been posted before in other threads, the vast majority of the oneworld multiple sector flights are operated by AA, and the flight numbers and routing of those flights are always changing.

Many of the AA flights are tags to long haul flights, such as LHR-LAX-HNL, NRT-DFW-BOS or SYD-LAX-LAS, but while the long haul flight number tends to stay the same, where the tag flight goes doesn't. eg, AA64/65 is JFK-ZRH. For part of the year, it has a tag flight to/from MIA. For another part, the tag goes to DFW.
Then they have flights like BOS-DEN (via CLT), which only operates on weekends in Oct.

While a list of the non AA multi sector oneworld flights could be made and would likely stay current for a long time, any list that includes the AA flights would be out of date very quickly.

what happen on a 16 segments done with a number of these tag on flight when a re numbering happen to some of it?

Depends on what the change is and when it happens.
The ticket will be changed to accommodate the original booking. If it is just a number change with no route change, they will just move you to the new number.
For example, if you were booked on QF2 LHR-SYD and they changed the stop over point from DXB back to SIN. Nothing would change. You'd stay on QF2. If you had however booked LHR-DXB on QF2 and QF no longer stopped in DXB, you'd be moved to one of the BA flights.

In the case of the always changing AA flights...
If you booked for example BOS-SLC, and that route (where ever they happened to have the stopover point) was no longer operating, they would rebook you with a connection at one of AAs many hubs, so you might now have BOS-DFW-SLC. If the ticket was maxed out with the 16 segment e-ticket limit, they would tend to wait until the first few flights have been taken before making the changes, eg they'd wait until you have 12 flights left before changing it.
If that can't happen, such as the flight being first, they would get creative and find ways around the e-ticket limits.

The last LONE4 I took had NRT-MEL at the end. QF canned that flight shortly after ticketing, but before departure. I had 16 sectors and it had been issued as an e-ticket (this was just as the paper tickets were in the last stages of being phased out). I was rerouted NRT-SYD-MEL and reissued with a paper ticket with 17 sectors.
After departure that trip, there were civil issues in BKK (one of their riot/protest/government change messes a few years ago) with travel warnings and waivers out. Due to the issues, I opted to forgo the stop in BKK and go right to SIN. While in MAD, I emailed the travel agent at home who made the changes and created a new e-ticket with the remaining flights and the changes to fly FCO-LHR-SIN instead of FCO-LHR-BKK-SIN.

Those routes shows up in the OW route map as a direct connection. With the downloadable flight schedules app https://www.oneworld.com/tools/downloadable-timetables it have been easy to filter to show only direct connections on the map. I have noticed some of one coupon multiple segments flights originally from the map for my xONEx routings.

Unfortunately, OW is discontinuing the downloadable version from 1 October 2016.

:( It didn't say that when I got it last week.

I still prefer the old downloadable timetable that they replaced with the current one ~2 years ago. It was much more useable (and showed more flights, such as codeshares...)

I've just downloaded the latest OW timetable - it states in bold red lettering:

Effective 1 October 2016 downloadable timetables will no longer be available.

I ticketed a DONE5 that starts in 2017 CPT-DOH-AKL-.... After ticketing, QR delayed the start of DOH-AKL, so I had to be rerouted DOH-SYD-AKL. Since I was maxed out at 16 segments, the AA RTW desk dropped a DFW-xxx-DFW pair of segments so they could add DOH-SYD-AKL. As soon as I fly the first two segments, I'll call and they'll add back the DFW-xxx-DFW.

I've had AA (who uses Sabre) and other airlines do this, but it's always been airport agents doing it during irregular operations (when flights are delayed or cancelled). I'm not aware of reservations people doing it.