I´m working on a wireless project that uses some LAP´s 1250, 3 controllers 5508 and a WCS software to manage everything. In one of the areas there are a lot of users, around 90, this area has 6 LAP´s. Some of those clients frequently migrate from one AP to the other. When this happens the WCS shows that client is associated with two AP´s. But when I check the clients list on the controllers, the client is only at one LAP. We are using WCS Version 22.214.171.124. Do you have any problem link this? Is it a WCS bug?
I haven't run into this issue. This is just a guess but I'm wondering if the client association information is just delayed between WCS and the WLC after a client roams. You could check the client history and see the amount of time the client was associated to each access point and try to figure out what is going on.