Hey fellas can anyone suggest where im going wrong ??

Fitted my new oil pump today on my engine on a stand after block and sump been painted !

Cant get the sump to go on right . Seems like its not sitting right on the block ! Can get all the bolts in on both sides but some were starting to go in wonky but actualy went in ok after a bit of perseverence but cant get the ones in on the oil pump or flywheel end 1 Its been pissing me off for a an hour an a half so i just took it off again and walked away !

Any ideas or has anyone had the same problem ??