As for bolts not quiet going all the way thru.
I had a a very similar experience very recently.
Running Fuction 7 rear LCA's and the ASR rear subframe brace also.
When it comes to using the ASR rear subframe brace and the bits and pieces it comes with they assume that your using stock rear control arms and things.
I had to take the original bolt and go to specialised places like aka BOLT BOYS or other places that specialise in hi tensil bolts.
I did try repco and super cheap but they didnt have 70mm + M8 bolts and was gonna take longer just to order 1 in.