i’m pretty sure you need a transport to move between islands
the 12 ipc’s is 1 time only, it can be saved and used later, but you don’t get 12 more ipc’s
AS TO THE ORIGINAL QUESTION, YES YOU MISSED A RULE. GERMANY CANNOT BUT 56 IPC’S WORTH OF ANYTHING IN THE FIRST ROUND (YOUR 4 TRANSPORTS & 2 DETSTROYERS.