My 5 SBSS TV guides are 1/2 hr out.Can you please help me?

Hi, my TiVo lives wth me in South Australia & here we operate on Australian Central Standard Time. 3 months ago I moved from NZ to live here in country South Australia

When I restarted my upgraded TiVo, I used the Adelaide central post code of 5000 as my location.

The TiVo program guide runs correctly for the rest of my tv channels - but not for my SBS channels (SBS, World Movies, Viceland, Food & NITV)

The TiVo program guide has my SBS shows starting a 1/2 hour earlier than they reality.
- It looks like the SBS guide is running on Australian Eastern Daylight Time

Can someone please help me ?
Cheers Lenn1e