Question:

Perhaps a dozen times this evening I've offered to swap ('lend') +30k USD for 30 days at a high interest rate. Repeatedly my offer is on the books for a short period, and then is either briefly accepted and then kicked back to my 'swappable balance' or appears to go directly to 'swappable balance.' What is going on here? Why can't I just offer it and know it will remain on offer until it is accepted??

Thanks in advance ...