What years your motor. Looks like they've changed the plug design slightly then if you pins won't insert. The plugs sent to you are the latest versions from VAG, I've a draw full. I've got a couple of older plugs at home I'll have to compare them.
The connectors I supplied will fit on the old and new coil packs you have but it looks like the there's a possibility the internal pin design has changed and some internal dimensions on the connector to accommodate this new pin.
How do the pins look dimensionally when held against each other.
Options are
1 - Find a couple of older connectors (I'll have a nose around at home)
2 - change your pins for the newer type to accommodate the new connectors (ball ache)
Leave it with me If I've got anything I'll post them FOC for the additional headache it's giving you with all the other work your doing.