Pluggable Mapping Won't Fully Synchronize

I'm hoping there is perhaps just a config setting of some kind that governs how a pluggable mapping is embedding in a real mapping that is causing my problems.
The situation:
-Mapping A is my actual mapping.
-Mapping B is my pluggable mapping which implements a whole mess of stuff, including a very large and complex Joiner operator.
-Mapping A uses pluggable mapping B.
The problem:
I recently discovered that I had some errors in the join condition used by the Joiner in pluggable mapping B. I modified the join condition, etc, and saved. I then went into Mapping A and did an inbound sync on the pluggable mapping operator so that mapping A would pick up the changes I made to the join condition in pluggable mapping B.
Mapping A does not pick up the changes to the join condition when in generates. I have inspected the generated SQL by hand to confirm. I'm now afraid that syncing a pluggable mapping operator only picks up signature changes? But it seems absurd that when using a pluggable mapping in a regular mapping, the internals of the pluggable mapping would get so fully embedded before even generating, and that the only thing you can later change without having to delete and re-add the pluggable mapping operator is the signature?
Does anyone have any insight? I would really appreciate any thoughts. In reality, this pluggable mapping is used not by one, but by many regular mappings, and implements some really ugly logic that has a very wide input and out signature. So I really want to avoid that obvious solution of having to simply delete the pluggable mapping operator from the main mappings and add it again (which I'm darn sure would work), and have to reattach all the connections. It would take hours and hours.
Thanks in advance for any help.
-John

Well David, I owe you an apology for wasting both our time.
I have looked at it with a pair of fresh eyes this morning, and the problem was mine. As I think I mentioned in my original post, this pluggable mapping is actually used by a large number of regular mappings (about 15). Each of these regular mappings handle a different step in the loading a primary target table.
In my confusion, I had missed a sync in one or two, and had apparently been bouncing back and forth between one I had synced, and one I had not when looking at generated code. This caused me to think the syncing and generation were not occurring properly.
Too many late hours I'm afraid...
So again, I apologize for the wild goose chase, but really appreciated your input. It appears that the problem is solved (or never even existed) !

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