TapaTalk and my Samsung Galaxy S 3

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http://forums.androidcentral.com – Morning all I'm a little confused. I have TapaTalk (the current version on Google Play) and have about 4 forums logged in. But, if I click the delete button on the right, to remove a forum, within 10 seconds or so, the forum returns. Any reason why? Also, is there a way for it to NOT show in 'previously viewed forums'? Thanks in advance Ivan (HowTos)