I've done this 3 or 4 times so far, but I've noticed that the seed bonus 'cost' stated is never whats deducted, it's usually a lot more.
with the last one I did, it stated that I would have to pay approx 20 seed bonus points for 3 hours. However I noticed that almost 40 points were deducted.

it happened the time before as well, can some tell me what is happening with this.

Daresme