Check to make sure the ticket price is not within 5 blocks of a price adjustment. Also, make sure Decrediton is running and that your wallet is fully loaded. Lastly, read the error message. It is often very indicative of the problem.
Decrediton doesn't fully know how to interpret split tickets. The ticket should still be visible on the Tickets page in Decrediton, but your locked balance will be incorrect.
See my post on the subject here. You can check your purchase confirmation email to see if you were selected as the voter for your split ticket.
Yes! Your wallet and split-tickt-buyer must remain open until the session fills up and the ticket purchase goes through.
Your reward is proportional to the amount that you contribute to the session. If you contribute 50% the price of a ticket, you will receive 50% of the reward.
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