So, when I was putting the rules back last night, I discovered another document: Rules Clarifications from General M. Bradley, Supreme GameMaster. It’s dated 1991; the game manual was dated 1986. Note that the rules are second edition and says that both transport and amphibious assault rules have changed (presumably since the first edition). So it’s possible that the OP was using First edition rules? To be honest I’ve never seen those, although now I’m curious…
So in the rules clarifications, there’s no specific clarity on whether a transport can load in a hostile or enemy-occupied sea zone. But it does say that bridging is as the OP said: you can bridge with a transport after it moves. So I was wrong on that front.
But, it does say again that for an amphibious assault the zone must be cleared before a transport can unload units. It doesn’t say or load and then unload units.
There does seem to be some evolution of thought from the 2nd edition rules to the rules clarification. In the 2nd edition rules, there is an example of units moving from Japan to Manchuria and the transport could do so “without ever leaving the sea zone”, which suggests that it would have started the move there, because in the paragraph before, it states in bold caps that a transport’s move is over once it unloads. But then in the clarification, it says that the transport can move before bridging.
Also, in the 2nd edition rules, under the section “how they fight”, for amphibious assaults, it says:
“If you are launching such an attack and the sea zone adjacent to the target area is enemy-occupied, then your naval force including your cargo-laden transports must engage in in combat before the amphibious assault can occur”.
To me this suggests that the transports had to have been loaded prior to the battle, not after, and such a move has to be done in a friendly sea zone, not an enemy-occupied one.
Anyways, hope I’m not putting anyone to sleep - I just find this issue really interesting!
L