Things can be confusing on Metro at times. Perhaps the worst problems are with the automated announcements and signs in the trains. These regularly provide incorrect information, such as the announcement and sign in the train this week that stated, as the train was arriving at Flagstaff, the next station was Parliament (2 stations back). And this is by no means an isolated example.
There are also regular issues at Flinders Street, too. Last minute platform changes are perhaps inevitable, but so often the announcements are unclear at best and confusing at worst.
But there's unnecessary confusion programmed into the system, too. A classic example is the recorded announcement regularly made at Richmond, when a train running direct to Flinders Street is approaching. The recording states that the train will "stop at all stations". I have looked in vain for a new station to service the tennis centre or the MCG, but to the best of my knowledge, there are still no stations between Richmond and Flinders Street.