Bolt length calciulating wrong

Dear all,

I have a stange problem in bolt length calculation in extracted isometric some cases.

Im expecting lenth is 350 (thk flange1 + thk flange2 + thk gas1 + thk gas2+3+3), but it is giving 750.  

What is the problem, Please note Im using old bolting method

Regards

Dear all,

I have a stange problem in bolt length calculation in extracted isometric some cases.

Im expecting lenth is 350 (thk flange1 + thk flange2 + thk gas1 + thk gas2+3+3), but it is giving 750.  

What is the problem, Please note Im using old bolting method

Regards