I am the owner of  a tp-link vr600 v2 and i have this problem..

When try to assign ip to specific devices in address reservation table, i can assign ip only for 9 devices.. then when i click on add to add the next device router stop responding and i have to click to another tab and then back to add, and the same thing happens.. I cannot assign an ip tp the 10th device...is that a bug of routers firmware or what... router can only apply ip only to 9 devices????