1) simply reverse the percentages in the flaperon screen under flap.
2) Your output is perfectly normal for a first charge.
3) Yes. please read your manual in detail. it explains that you can't use the built in "ail-diff" function which uses channels 1 and 7 at the same time as you use the flaperon function which uses channels 1-6; however, you can create differential iwthin flaperon as described in detail in the flaperon section of the manual.