Janet and legend9182,
I can select a 60% boost with 24hour duration, or a shorter boost with a smaller boost. I don't think you can get a 60% boost with a shorter duration.
Paliadic te pure,
That is the way to get two boosts at once, which is not what I wanted. I just wanted to relinquish the first boost early, if I am willing to forgo the benefit of the boost why should the game force me to benefit from it when I don't want to. Poor user interface design, like the dialog which is presented after creating an offer to do a trade, there is just one button sayings 'sounds good' but there is no cancel button. WIth only one option the dialog is pointelss, not just that bit if you have made a mistake the only way to cancel it is to go to the list of offers and cancel it there.