I am not sure what part of your work twisted but tunisian work does curl terribly so you need to really hold your work firmly and be sure it is flat so you can see the bars of the stitches that you need to work in. Apart from that aspect, the tunisian knit stitch is supposed to "twist" ---which is what makes it look liked knitted stitches instead of crochet stitches.

Just keep reading the online info that has written instruction as well as step-by-step photos and also watch and replay the videos. It does takes time and practice! It will get easier. There are some really nice tunisian stitches, some easier than others, but I enjoy all of the stitches I have learned so far....after much practice with each one.