Creating the bond cost 0.5 BTC (I also got charged an extra 0.5 BTC on some operation, not sure exactly which ... I'd really want to see a charge history feature in GLBSE)
Have you seen
https://glbse.com/fees.html? It doesn't list any other 0.5 BTC fees. Isn't there someone you could contact about that? Doesn't seem like double-fees would be something any startup would want to have potentially driving away customers/users.