There is an issue with the Depot creation in friendly ports. Attached the screenshot - that shouldn´t be possible as far as what I got from the manual.

Moderator: MOD_EIA
EIA Rule
7.2.2 * DEPOT INSIDE A FRIENDLY PORT OR IN A PORT AREA: Even if not itself a supply source or part of an overland supply chain, a new depot may be placed in an area containing an unblockaded friendly controlled port, provided there exists a friendly unblockaded sea supply source (see 7.4.3) to the port.
7.2.2.1: If such a port is besieged, then the depot is placed in the port city itself. This is the only case where the depot is considered to be in a city rather than in the surrounding area.
7.2.2.2: Another, enemy depot could also be placed in the port city's area while a depot is also in the port city itself. This is the only case where two depots may be located in the same area (actually, one in the city and one in the area).
EIANW Rule
10.3.2 Depot Inside a Friendly Port or in a Port Area
Even if not itself a supply source or part of an overland supply chain, a new depot may be placed in an area containing an unblockaded friendly controlled port, provided there exists a friendly unblockaded sea supply source to the port.
If such a port is besieged, then the depot is placed in the port city itself. This is the only case where the depot is considered to be in a city rather than in the surrounding area.
Another, enemy depot could also be placed in the port city's area while a depot is also in the port city itself. This is the only case where two depots may be located in the same area (one in the city and one in the city area).