Ethics - Where are they?

I have watched the same guy post loads for one rate and then post a little later for less money, then post a little later for less, then post a little later for less. Not a problem in my opinion by itself, however, this guy is telling trucks he will get them a confirmation and then will repost after. We fell for this around a month ago, same guy, and it's sad to see he is still at it. Am I wrong in thinking that this is bad business? If I give a verbal commitment to hold my truck, I never jump ship because I seen a better load, I bite the bullet.

 

I only had it happen once, same guy. Usually we get the "The shipper isn't shipping it". But this guy takes the cake. I am in the spot quite a bit, so I see him doing this just about every time I am here. Oh well, I just wanted to see if people are seeing this allot or if I am off base.