On the positive side, once you know this little foible it means that past Lvl 30 if you ever get that modification on an item you can 100% extract it no matter what, by using small contraptions. You never have to go through the lottery of wondering which augment you will get back. It also means if you want the augment other than the run speed on a red/purple item you can guarantee getting it by using medium/large contraptions.

Swings and Roundabouts