Butt in by all means! I know I shouldn't indulge in gossip like this *shifty eyes* but it's like potato chips isn't it?

I think the real reason she was annoyed was because she thought it was something the cast should have featured in together and not just Sarah

Which I suppose could still could be a rationalization for other issues - or more annoyance on a pile of others. As you say, Aly's issues. Obviously they weren't "tight" anymore if they'd ever been in reality. But Sarah having her own covers and interviews was hardly anything new (there's lots of video interview with her from back in the day on YouTube). She was THE star of the show. It's All. About. Buffy. (contrary to popular opinion.) Take away "Willow" or any other major character and the show can still function; f.ex. DB, MN, ASH. Take away Buffy and you've got - a spin-off version. The only contrary example that comes to mind is Valerie Perrine dropping out/fired from "Valerie"; Sandy Duncan stepped in and it became "Valerie's Family." (And that is the only time you'll see it mentioned in the same breath as BtVS.) Was that the same show, a spin-off, or both?

In any case, doesn't the magazine makes the decisions as to who/what it wants to cover? Or is it also on the actor's manager/agent? In any case, I'd say Aly got the last laugh, career-wise.