Now you're contradicting yourself; you said that you agreed that the watches tick at the same rate through the wormhole.
So, I take it that I was right:
You disagree with all of those statements. But it is a simple fact
that you can do all of those things, if a wormhole is present: that's the definition
of a wormhole.
That's fine, but 55 seconds earlier on Frank's watch, when Frank's watch read 5 seconds, Fred's watch also read 5 seconds, through the wormhole, and Fred can step through the wormhole at that time.
For the N+1th time, Fred doesn't drop into the past by being centrifuged. Fred, Frank, or anybody else can drop into the past, regardless of whether they were centrifuged or time dilated with respect to anyone, if
they step through the spun wormhole mouth.
Of course it does. If you just have two synchronized wormhole mouths, then if you step through one of them, you will immediately appear out the other at the same time. It's only if you centrifuge one of them that the mouths are connected to each other at different times.
Nobody's dilated seconds are being "transmuted", traded or anything else.
Why do you keep repeating yourself after being corrected several times? It doesn't matter
whether Fred experiences any
time dilation: he can still go back in time if one of the wormhole mouths
experiences time dilation, and so can anybody else, time dilated or not.
Your statement is has nothing to do with the predictions of general relativity, or even logic.