something liable to be wrong with your car not the map there mate, know two people with maps from red dot. both excelent maps and both had no problems, one is a grande punto with 187 ish bhp and 310lbs torque ish. cant remember what sort of power the other lad got but know they both got good gains and kept the same mpg as before (or got better if they didnt drive heavy footed)
as for mpg this mornging i was geting 15 mpg at first when the weather was cold but that was stop start stop start ect. after 5 mins when i was cruzing at 50 mph i was getting about 35 mpg.