Bar charts

Hi Guys,

Quick question, im currently in the process of fixing this issue but i can’t figure it out! Probably because iv been looking at it all morning so it could be something simple, i have a report that pulls information and then generates it in to a PDF and for the values it pulls it generates a “Bar-Chart” etc

But on one of the “Bar-Charts” its un-even and by that i mean for example say i had 4 values, 5,10,15,20 etc and ideally i want it to flow so smallest value as the starts building up to the highest value but for some reason i don’t know why it goes from 10 then to 20, 5, 15 :-/ it doesn’t look very professional and im just curious to find out if i can run a rule that will change that?

Thanks in advance.