No your filter is not wrong,
I was using filter numbers that are common type or constuction. The info about internal bypass ability is correct and some are designed to have it and some are not, the 8a is not. The filter design in your case does not matter for your problem at all. The filter block was bypassed so it simply is not the issue either. I was relating the fact some housings have a built in bypass to deal with clogged or overpressure filter and if plumbed backwards will be a problem. You bypassed the mount so it can not be an issue. PS I run the 8a type filter on all my toys as I do not want any bypass in filter and protect flow potentials in other ways.
http://www.mgnoc.com/_overlay/Archives/oil_filters.htm
Here is a quote from above just for reference =
The spin-on oil filter has its own bypass relief valve: an “internal” relief valve. The filter’s internal relief valve allows oil to flow past the filter element without passing through it when the filter element’s resistance to flow is above the filter’s relief valve setting. This performs the dual function of protecting the filter element from damaging high differential pressures, as well as protecting the engine from potential oil starvation caused by a plugged filter. SAE HS-806 lists five standardized internal relief valve settings.