Although I strive my best to allow for any character to be made as easily and flexibly as possible, there's only so much one can do with software. Computers like rules, and the software behind this character maker is no exception.
It's the intention of this application to "warn, not deny."
Which means, it'll let you tag on whatever you want, whenever you want for the most part, go negative funds, have too many edges, too many spent attribute or skill points, etc.
It'll let you do it, but it'll tell you when something's wrong, and it'll even try to hint at getting your character "nominal," with edges and hindrances. Just look for the big icon in the bottom-left hand corner (once you've clicked on one of the navigation items above), and click on it to get a summary of what needs to be done.