I-cylinder body wrong?
 

I was working on our team's inventor award submission. I was working on our goal grabber when I did a constraint that was right, but it was acting wrong. I enventually looked at the actual cylinder (3" stroke, 3/4 inch bore) and it was actually 6 inches. Just to do a sanity check, I made a new one in a new assembly, and it still didn't work. Does anybody else have this problem? Is there a typo on the table (I went through and didn't notice any). Any help would be appreciated.

Thanks,
Daniel