Facebook says I'm online every time I log in, even when my chat is offline?

[Sadie]

I just found out that for the last couple of days my Facebook has been showing that I am online on the Facebook chat. When I go on Facebook I almost never go on chat, I always have the settings as "offline". But people have been messaging me like I'm online and I have no idea why! I'm not logged into Facebook on any other devices, and no one has access to my Facebook but me. Does anyone else ever have this glitch? Will it go away soon? I reset my password a lot, but I'm getting paranoid...