why hasnt betfair added the others

Probably waiting til the phone vote numbers are up confirming they're all in

so do they void current market?

NOTE: This market is currently 'Incomplete'. Further runners will be added to this market should they enter X Factor 2010. When Betfair is satisfied, using all reasonable discretion, that it is unlikely further contestants will enter X Factor 2010, the runner 'Any Other' will be added to this market. At this stage the market will be set to 'Complete'. Thereafter, further contestants will be included under 'Any Other'. This market will not be partially settled until the winner is known.

no they will just add the others

They haven't added the others yet cos they don't care! [;)]