Also I just noticed you said v0.1.9b, yeah, rotations and scale are pretty bugged in b. v0.1.9d came out today so I thought that's what you meant. You should download that version, it should address most if not all bugs with that.
Viewing post in I honestly miss attaching custom images from 1.9
Are you still having issues with this? Some stuff will attach to objects and then flip left/right when they get loaded back in. It's a limitation of the custom system, maybe this is what you're experiencing. If this is the case, click the "flip" button on that custom item and save the slot again and it should be okay then