I did see others stating an issue with redirecting clients to a different gateway (in/out the same interface) but we aren't doing that.I do use SmartPort but for VoIP handsets only as it helps with ease of deployment and the feature is awesome.I just...

Did you end up getting to the bottom of this? I too have the same issue, I am not routing traffic back our the same interface which is an apparent bug and have done all you mentioned too, yet to contact support as I find I can often work it out mysel...