Hide minus signs and eliminate zig-zags?

Hello, I'm currently using XMind and am able to generate polished, attractive decision trees. I would like to use MindManager due to it's formula and calculation capabilities, however the visual output contains a number of distracting zigzags and minus signs. Is it possible to eliminate both of these issues? If not, I will probably continue to use XMind and calculate values separately in Excel.

See the attached file with highlighted zigzags. This is not presentable to an executive audience. XMind displays this same tree cleanly, without zigzags. Also the minus signs auto-hide so they are not normally visible (a nice feature!).