Dusty, Version 2015.04 for Farm Works will be coming within the next few days. This resolves the issue where Tank Mixes do not show quantities in the Job Properties and fixes the conversion issue for the individual ingredients on the Job Report. This will not change previously read in data but will make it so any data you read in will be corrected (so if you delete the jobs and read them back in they'll be correct).
Regarding Connected Farm Field, it does not presently support Tank Mixes. So the tank mix will show up as a material with the total quantity.