IP exemption question

[Cennyan]

My wife and I play on P 99. we started we started two new alts...a bard and a druid. Since our mains are a warrior and shaman we swapped several pieces of gear from our mains to our aultz to make leveling easier. During this process we both logged in and out of several different characters numerous times. Once finished my wife would log her shaman and buff my Bard and then log her druid in. my wife started my wife started getting a message "your IP address your IP address is temporarily banned". At first we thought that they might have thought we were two boxing but after awhile she was able to log back in. is it to prevent people from lo is it to prevent people from logging in and out too often?