Issues with the random placement

[Jebavi]

I found some issues when I use the random placement on the board
If I select a ship and then press Random placement I get a "extra ship" to place on the board.
Also, the IA start to fail when I play with this issue.

[Acrobyux]

Yeah I was able to place a 6th ship too, and the AI wasn't able to attack me the most part of time.
It only attacked me 11 times.
** The way to recreat this is selecting any Ship and then click on Random placement, it let's you to place the 6th extra Ship and then the AI goes wrong.