Oh my god you're hilarious. You know one tick is 6 seconds right? So four ticks would be 24 seconds. If every bard song lasted 24 seconds you would be able to twist EIGHT songs at once, because it takes 3 seconds to cast a song. So you've contradicted yourself. As for the Bard dots, I posted so much evidence that they last only 3 ticks, so you're just being delusional if you don't acknowledge that. My evidence is incontrovertible, all you've posted are your own (incorrect) memories and attacks against the staff. As for Bard charm, I would love if it lasted 4 ticks, but you will never be able to find a classic source that agrees with you because you're just clearly wrong.
And you CAN twist four songs at once. Get good:
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[Sat Feb 25 12:33:49 2012] You feel protected from cold.
[Sat Feb 25 12:33:49 2012] Your song ends.
[Sat Feb 25 12:33:52 2012] The harmony surrounds you.
[Sat Feb 25 12:33:52 2012] Your song ends.
[Sat Feb 25 12:33:56 2012] You are more alert.
[Sat Feb 25 12:33:56 2012] Your song ends.
[Sat Feb 25 12:33:59 2012] You feel replenished.
[Sat Feb 25 12:33:59 2012] Your song ends.
[Sat Feb 25 12:34:03 2012] You feel protected from cold.
[Sat Feb 25 12:34:03 2012] Your song ends.
[Sat Feb 25 12:34:06 2012] The harmony surrounds you.
[Sat Feb 25 12:34:07 2012] Your song ends.
[Sat Feb 25 12:34:10 2012] You are more alert.
[Sat Feb 25 12:34:10 2012] Your song ends.
[Sat Feb 25 12:34:14 2012] You feel replenished.
[Sat Feb 25 12:34:14 2012] Your song ends.
Lastly, please tell me why the evidence I posted is invalid somehow.