A bug was reported, saying that the "Record Series" option wasn't being displayed for all of the shows that it should have been. I've fixed it now, so if you update your guide you should see the Record Series option available on a lot more shows. There may be the odd one still not showing right, but about 99% of them should be ok now, and by the end of today (Thursday, 26 Feb) they should all be fixed.
Thanks,
Russell