Clock resetting after connecting to home WiFi network?

[index1366]

I'm having an issue now for a few weeks, and that is, if I connect my Trophy to my home WiFi network, after I turn the setting off, the time goes for approximate 10minutes backwards. That's becoming very annoying, because I have a "phobia" of connecting it to the network and I'm annoyed of constantly resetting the time.. Am I the only one with that issue, or is it just my phone?

Phone: HTC 7 Trophy (imported from Germany)
Country: Slovenia
Provider: Mobitel
OS version: 7.10.8107.79 - WP7.5 Mango