Thanks SoBroithe. Rereading this comment I realise I wrote it too quickly and have edited it.
There are many ways to be like your mother without looking like her. You could both have graduated from the same college, both do the same job, or both play lacrosse, for instance. This is one of the occasions when Duo only accepts one meaning. They think, "Je ressemble á ma mére" only means that I look like my mother not I think like her or behave like her..
'I remind my mother' means you're telling your mother not to forget something.
'I remind me of my mother' means you see similarities between the two of you but it doesn't necessarily mean that you look like each other. (You could both react the same way in the same situation, for example.)