How do you find the PP calculator

Hi all,
Bought the pp calculator 2-3 weeks ago and have been using it a good bit. Has anyone noticed how easy it is to make a mistake on it. Tonight I worked out pp in a galaxy bubbles bar (31g), NV was for 100g so put in the protein, carbs and fat and worked out as 10pp which I then worked the bar out to be 3pp which I thought was great . Was posting my latest and greatest find on here after I ate the bar and double checked the pp again with the calculator and got 15 this time round, double checked it and 15 was right, so hence have gone over my points for today and over on my weeklies too. AM now not a happy bunny and am dreading the wi tomorrow evening

Anyone else came across the same problem?

i find the buttons can be hard to press sometimes yes. I always double check i've entered each part in correct before I press enter

Don't worry bout yer weigh in. Your body won't have time to convert the sugars to fat do you should be fine try and drink plenty to flush yer system out! I use the calc on my iPhone and love it! There free too if you have an iPhone, I also track on it as it's always at hand anyway (I'm obsessed)

Good luck in your weigh in