Yeah yeah yeah I read all of Hypersmurfs post and just as Danceofmask has said he didn't prove anything.
Which is quite a bit different than the "nothing supports, it's just a houserule, lalalala" that you were spouting. By the way, you might want to review the forum rules before you get reported. It's a breach of etiquette to tell somone "If you do that it's a houserule" just because you disagree with them.
And DanceofMasks admitted he was in error, in his second to last post.
Despite your handwaving, it looks to me like Hypersmurf did prove something.
The relevent bit is "
Some effects do something, such as attack, when you sustain them. A power's description indicates what happens when you sustain it or let it lapse."
Nothing in your posts counters or refutes that, you have just ignored it.
In this case, when you sustain it, the power becomes "Save Ends", because thats what it says on the "Sustain" line of the power. It doesn't say it anywhere else in the power, so it doesn't apply until the effects of the "Sustain" line are applied, and that doesn't happen until you actually Sustain it.
I will agree that this is a "newbie unfriendly" rule, and could have used an example or direct mention in the section on sustaining powers. But this is the only way that does not contradict the text on sustaining powers.