couple of things...

have you only fitted the centre bearing cap,or all of them?

did you fit them with arrows facing front?

the shells are fitted dry to the block,and then smeared with oil once fitted, same with the cap,fit the shell dry and then lubricate it (and the crank journal) before fitting. the grooved bearings go in the block,and the smooth in the cap.

Are the dowels still fitted ?

tightening torque is around 95nm (i suspect you already know that) but lubricate the thread and under the bolt head with oil before torque-ing them up,and do it in one clean movement.