The person may just not have seen it. I would give it some time a and see what the next cache log says. Or, you could just go check the cache yourself. But don't give up! I just located a few travelers that have been missing for five years. Will be getting them back on the move shortly :-D
It's quite big and has 2 added keyrings and was placed in quite a small cache. The cacher mentioned that he placed a TB there himself so I'm sure he would have seen it. Yes - I may be being a premature saying it is missing but I must admit I just don't have a good feeling about it.