Sliding crosscut table fence question..

I love the table and the fence is nice as well, however the stop blocks are causing me an issue with consistency. Why they designed them in a non traditional way where the whole blocks sits flat on the table I don't know.

I have been trying to do 45s on both side and the one side once cut will always slip underneath it to the cuts are not the same. Has anyone found a secondhand block that is better?

Thanks.