https://www.youtube.com/watch?v=f1FXvH6g7NE&feature=youtu.be

Running Meka 9.1 and Forge 10.13.4.1614

Confirm it's duping.

Looks like 1.7.10 is getting no updates anymore: https://github.com/aidancbrady/Mekanism/commits/1.7.10

any progress?

(I can confirm with other blocks too, like "Washer" )

Not asking for a big update, this seems to be easily fixable ....
Like blocking shift click in the gui '-'

If i could do i would, but i dont know how :V

Can't reproduce on 1.10. Seems to be fixed in one of the many commits between 1.7.10 and 1.10 or upstream (Forge).

1.7.10 isn't supported. Sorry. If somebody creates a PR to fix it I'm sure it'll be merged but aidan won't go out of his way to fix it AFAIK.