This would be a terrible decision, because bards are already feat starved, and 2 feats + 1 twist is a high enough opportunity cost to justify leaving it in. Youll be nerfing doublestrike and survivability from something that already qualifies for it in every single other way, other than the arbitrary "we cant allow you have these both at the same time". Right now builds have them both and the game isnt more broken than it already was before.
http://i59.tinypic.com/2mo8gop.png
According to this, which is how the in game description on the enhancement, and wiki descriptions read, it is not a bug, as skirmisher allows you to specifically use bucklers with SWF.