Yum dependency installation order?

Ok, I am running into some strange issue and was wondering(suspecting) 
if it was by design and if so, is there any way around it.

Basically I have packages that require other packages for the pre/post 
scripts - but it looks like dependency resolver does not guarantee the 
order the packages get installed in - which means that even if the 
package I need is being installed, sometimes the post script fails 
because it is being installed after.

So.... I am sure I am not the first one to run into this, what is the 
proper way of dealing with this?

Thanks.

-Michael