Ah yes, quick response by IATA in reallocating the JE code but not so quick response by fare search engine in not picking changes up.

We used to have endless fun in IATA trying to carry out longer term historical analysis on traffic by city pairs and finding the oddities in our database like a variety of carriers with the same code. It was never a problem for the people reallocating the codes just the poor analysts trying to crunch numbers years later.