Is This Common For a Custom-Built Torque Converter???

So, I followed advice and a reference from a reliable shop to have a converter built for my 416 stroker/727 combo off of my dyno specs rather than taking any stabs in the dark. Great, It arrived in one week flat. I was happy! Until I opened the box and saw two very large counter weights weld on one side of it. Called them up, they assured it is common to have some with no weights at all and some that require quite a bit.
I reluctantly say Ok and then try to bolt it up to my flex plate... no dice. It should have a 10 inch bolt pattern but it measures out at 10 1/8 inch and there's no way it will line up in any combination. I have 3 different flex plates to compare and all are the same at exactly 10 inch spacing. I also have 2 other converters that bolt right up to any of those 3 flex plates.
Call them back and they basically tell me that's not possible but gladly agree to refund my money. They asked if I wanted them to build me another one and I politely declined.
I'll be calling PTC later today to order a new one from them instead.

Here's a photo showing the counter weights. None of my other converters have any weights on them and I just didn't like the idea that it could be that far off in a neutrally balanced setup. i also figured there would be a drain plug... nope
I'm glad to hear others opinions on the weights. Either way the damn thing wasn't gonna bolt up though.

Bad converter from BTE.jpg