I had a $150 cert received because they've been taking too long responding to an email about missing TravelBank credits.

Was booking SBA-SFO-IAD-LGA and LGA-CLE-SFO-SBA as two one-ways because that was the only way to get it to price correctly. Whenever I tried to apply the cert to the outgoing SBA-LGA, it gave me an error and said I needed to call. I applied it to the other direction LGA-SBA instead, and it applied just fine. Then I was able to book the SBA-LGA direction without the cert with no problem. Seems odd that it couldn't apply correctly to one but worked fine on the other.