IP office 500v2 8.1.63 using Norstar sets automatically conferences outside calls when transferred

[greggster]

Has anyone heard of a problem happening on an IPO 500v2 using Norstar sets that when (2) calls get transferred to the same extension using a 7316 with an add-on mod with the buttons programmed as a "USER" prior to VMpro answering, the (2) outside calls get automatically get conferenced together? It seems like if you manually enter the extension under the same preface, instead of using add on mod, the problem doesn't happen.