Explain reassociation messages please?

I keep getting the following, over and over, from multiple customer equipment:

Town: {MACADDR} attempts to associate
{MACADDR}@Town: reassociating
{MACADDR}@Town: disconnected, ok
Town: {MACADDR} in local ACL, accept
{MACADDR}@Town: connected

Why are remote radios attempting to associate before they are disconnected? It looks as if the disconnection is being performed only because the radio has already attempted to reassociate.

you should enable debug logs and see in detail. all messages explained here:
http://wiki.mikrotik.com/wiki/Wireless_Debug_Logs