Templates vs Stegadon

So I'm looking for a rule clarification how templates aka our cannon and stone throwers work vs the stegadon?  I see that in the FAQ that the steg counts as a ridden monster and on pg105 of the rule book it lets us know that templates hits both the monster and the rider.

Now is it just that simple as I know the Lizardmen book has its own rules to it against it?

Can someone clear this up or walk me through this as I just got two Stegadons in my face at my welcome back to WHFB game of 1500pts.

It isn't very fair for Lizardmen players, but yes, the cannon will hit all parts of the stegadon.  You can kill everything in 1 shot.  If you're going for a competitive list than I would highly recommend it.  If it's a casual game and you're just going for fun, don't blow a hole in your opponents 400+ pt steg-wizard combo on turn 1.  The rule favors us heavily, just keep that in mind for your games.

Yeah cannons will kill it all in one shot but a stone thrower will not.

If use a stonethrower type weapon, the center hole has to be randomized between rider and mount. So for example with the Hellcannon (which fires as a stone thrower) the S10 D6 wounds will hit the stegadon on a 1-4 and the rider on a 5 - 6.

The one that is not rolled gets hit with a regular S5 single wound shot.

I didn't know that and played it that the whole model got the D6 wounds because I knew that cannons shot that way. I ended up killing an Emperor and Griffon in one shot with my Hellcannon. Poor guy didn't even know I cheated and neither did I! I since confessed though.

Thanks for clearing that up and I'm sure I will have more questions over time but a lot of them are already answered on the forum and that is nice. 

Ya I had a very simple fun list to learn with and my buddy was worried that I would be taking mournfang so he went crazy with super slann and two stegs.  All I had was slaughtermaster, bruiser, bulls, and a few leadbelchers and it was a rough game for me.  MPV was my Slaughtermaster   

PS: From another thread I was doing my lore wrong but we were really doing noob hammer and not warhammer with the wild amount of mistakes we were making.