I just found out that the MVP rate is still available from the MVP web site. If I check the same hotels and dates on the HHonors web site using code 0041604 and on the MVP web site, I get a lot of availability on the MVP site and NONE on the HHonor site.
I also compared the MVP rate on the MVP site to the standard rate, and IT IS the real MVP rate.
It looks like it may be a bug on the HHonors web site???