You are correct with Alpha, Beta client statements.
I haven't tried putting an unmanaged switch/hub between the Alpha clients and the s2500, but that is definitely worth a shot.
An interesting development though is this: I've taken one of the Alpha clients and connected to a completely different site, that is still wtihin our network. It is on a completely different s2500 and subnet. We'll call this location C.
So, the Alpha clients CANNOT connect at Location A
Beta Clients CAN connect at Location A
The Alpha Clients CAN connect at Location B(which is where our main data center is located, but obviously we have it segregated into several different vlans.)
The Alpha Clients CANNOT connect at location C
The Beta Clients CAN connect at location C.
Also, yes we've tried connect the Alpha Clients to Location A with a smaller patch cable, circumventing the long cable run.
Thanks