jetabroad prices it out, but won't let you purchase

I got this message over and over

We have encountered an error while trying to complete your booking. Your credit card has not been charged.

This error has occurred because the airline reservation systems are indicating that a seat is available when it isn't. (This was revealed when we tried to secure your reservation.)
We apologise for the inconvenience. An error report has been generated; one of our consultants will be in contact with you during business hours to discuss alternative flight options.
If you are unable to wait for us to contact you, we suggest you retry your request and select a different flight/fare option.

then i switched sites ^^