question do you mean in chat rooms or in your profiles private message box?

reason I asked it because your original post sounds like the profiles private message box then someone replied about chat room...

if you have someone on ignore when they are sending you a message to your profiles private message inbox you will not see their message even if you have taken them off pm after they sent the message....

I have had people ask me why I did not answer their private message (the one sent to my profiles pm box.) I then had to explain to them my triggers vary some days something small will trigger me so for that day a person may be on my ignore list. during that time I dont receive any pm's by that person. kind of like getting a busy signal they may have to try again since they dont receive a notice when I have them on or back off my ignore list.

I frequently use the ignore listing when I am having a hard day so my moods dont affect others so after I explain the ignore list and not receiving pms by those on my ignore list I get a smilie back with a detailed pm on what they wanted to tell me by pm.

if you are a person that uses this self care option of ignore list this may be why you are not receiving some of your pm's that are in your profiles pm box. they may have sent their pm to you when you had them on the list then after you took them off the list they are wondering why you havent answered them back.