Desperately Seeking Jessicurl Advice

Recently I purchased sample bottles of three Jessicurl products: [buylink=]Too Shea[/buylink], [buylink=]Rockin' Ringlets[/buylink], and [buylink=]Confident Coils[/buylink]. I have been experimenting with them–alone and together–the only thing I haven't used by itself yet is the [buylink=]Confident Coils[/buylink].

-[buylink=]Too Shea[/buylink]: It takes a lot to get distributed through my shoulder-length hair. I think I've used the sample bottle 3 times, and it's almost gone, where as the RR and CC are still waaay up at the top. Two of those three times I used it, I didn't apply until getting that "seaweed" feel. My hair seemed to just suck it up, so I only put on enough to detangle my hair. If it takes me four uses to get through two ounces, a full-sized eight ounce jar will only last me a couple of weeks!

The products, used alone or together, make my curls curlier and more defined, which I love. However:
-It's not doing much for my frizz–which is the problem I was hoping to solve with this stuff, because I have a job interview coming up very soon. The frizz seems to have migrated down from the crown of my head, to the sides, by the curls.
-The crown of my head looks really greasy! By the end of the day, all my hair feels gross (this might be specific to the [buylink=]Too Shea[/buylink] days, I'm not certain).

Can anyone suggest any ways I could try these products and avoid the problems I've been having?
Perhaps all the oils in the products are causing the problem–does anyone know of products that enhance/define curl as well as this stuff, without all the oils to give me the greasies?

Any advice/suggestions/comments appreciated! I'd like to look somewhat decent for my job interview...