I have tried several of the "buff checking" mods available. I have stopped trying out new ones since I found yours. It is so easy to use and I love it!
On issue I am having is with the WeaponBuff. I am a feral druid who uses Adamantite Weightstones. After I have completely raid buffed myself (including the weightstone), MoBuffs still indicates that I am missing a WeaponBuff.
I was going to report that it did not record weapon buffs at all (since many of my fellow raisers report the need for a waepon buff), however, there were some other raid members who MoBuffs showed the correct info for.
Please let me know if you need more info, I hope that you are able to figure out what is missing. Perhaps it is only misreporting your character while it is getting the rest of the raid correctly?