What are you talking about? You are confusing the issue now because the date in your first posting and this your response are not matching. In the first one you said the conditional green card was valid FROM 05-07. Did you mean it was valid TILL 05-07?
If your green card was issued in May 2005, then it was correct that they gave you a conditional green card. In that case the answers we gave you previously do not apply.
You very likely will have problems with your citizenship if the reviewer scrutinizes the dates carefully because it looks like you FILED for divorce while the green card had NOT been approved therefor you were ineligible for the extension WITHOUT a waiver. And to get the waiver, your divorce should have been COMPLETED before filing.
Get a competent immigration attorney. I hope you kept that waiver things because it would be proof you did your part and filed the waiver but they are the one who dropped the ball and ignored it. Like I said, the reviewing officer has discretion and might either overlook it, ignore it, or sodomize you for it without the use of any lubricant.