See rule 40(3)(b) of the tribunal procedure (upper tribunal) rules 2008 (page 1448 of Vol III Social Security Legislation and page 1189 of the CPAG handbook)
http://www.cpag.org.uk/content/discounts-claimants
And it certainly doesn’t mean you’ll win next time: it means they agree there was some irregularity in the original decision/hearing that renders it unsafe, but not necessarily wrong.
Appealing to the Upper Tribunal - Social Security Commissioners.
As you are unhappy with the decision, you should have asked the judge that you would like a full written decision. This is a complete record of the hearing which the judge writes.
As you weren't at the hearing write to the 'Tribunal Services WITHIN A MONTH of the hearing and ask for a full written decision. In fact it's a good idea to make the request in writing just in case!
The written decision, which can take up to three months to arrive, does not commit you to anything. But if you do have the full written decision you are not permitted to seek leave to appeal to the Upper Tribunal (Social Security Commissioners), so it's worth keeping your options open by asking for a copy whilst you consider what to do.
I hope your Welfare Rights Officers can help you from there.
Good luck.