Google Talk voice chat defaults to phone no matter what - super annoying

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I use google voice chat on my PC, but I'm also signed in to gtalk on my phone.
Problem is, it always defaults to phone, and keeps complaining "you're not connected to WiFi, so you missed a voice chat request"...
It's incredibly frustrating, because it's too dumb to call the PC/gmail instead.

Beside completely signing off on the phone's gtalk, is there any way to default to gmail for that?

And also in GTalk if you click on Sign Out it actually never Signs Out, that's a very irritating stuff as I only use a single Google a/c for chatting and another for GMail. I'd very much appreciate a way out of this.
Regards.

BUMP...

still a problem.. =(