Lintelek fitness watch problems

I just got this lintelek watch after reading great reviews on amazon. But i don’t think it’s cpu ting my calories correctly bc it says I’ve only burned 262 cals since yesterday. I work out really hard 45 mins/day and the machine says 500 cals when I’m done. I k ow machines aren’t accurate and that’s why I got the watch. Yesterday it tracked my workout at 67 cals - that can’t be right - am I doing something wrong?i registered all my info.