Seems that there is a debilitating bug in OL13. it corrupts custom forms. i have heard from one person reporting this with custom email form. i have experienced it myself with a custom contact form. OL13 changes the names of email, address and phone fields. Choosing a field from drop down box will produce a different field from the one chosen. Also, the ability to access properties, therefor "display name" is removed. strange behavior.

i have posted about this in the social.answers.microsoft forum and have not gotten a response. Also in Diane Poremsky's slipstick forum. She has forwarded to microsoft. no indication about a fix.