Bug or Feature: Multiple Ship Training Facilities

[Fyron]

Multiple Ship Training Facilities on a planet do not stack. However, there is a way to get more than 3% training (ignoring the Psychic equivalent) from them per turn.

Take a planet, say Xerxes, that has 2 moons. Build a Ship Training Facility III on Xerxes and each of it's moons. Now, move a ship in orbit of Xerxes. Each turn, the ship will be trained by all three Ship Training Facilities, for a total training of 9% per turn.

This may be a bug exploit because building 3 Ship Training Facilities on a single planet does not result in 9% training per turn. Multiple facilities do not stack on a planet, but they do stack with multiple planets in one sector.

However, one could argue that it still takes time to get ships to the training center, and then to the front lines. The mooned planet may be in a location far from where you need your ships to be. So, in some instances, it will save you time. At other times, it could take longer to train your ships at a mooned planet and get them to the front lines.

The same thing can also be done with Fleet Training Facilities.

So... is this a bug exploit or an intended game feature? Either way you answer, please explain why. Thanks for your time.