I do all my Mexican seasonings due to the fact I'm stuck in Sweden and trust me when I say the mixes taste weird and chemical.
I am also allergic to citrus and intolerant most ready made mixes, so I am not used to follow package instruction. But I notice rice isnt always as it says on the box, some times sticky rice just become mush even if you follow it the instructions.
For a smooth mash, use a potato ricer or a fine sieve and a electric whisk.
For the love of Cheese!