product gone wrong: ooh la lift

so usually when i'm going to buy something i research it first.. or in other words i read a ton of reviews on sephora's website or i watch video reviews on youtube.. and i had done that..but for a different product.. so when i got to sephora i happened to discover Benefit's Ooh La Lift "instant under-eye brightening boost" and i bought it. i knew nothing about the product.. but i figured benefit was a good brand so why not just try it out right? well unfortunately, it has been a disappointment.. first of all, it didn't really do anything to "brighten" up my under eyes.. but worse than that.. it eventually did the opposite! after i started using this product i started to notice that i kept getting dark smudges under my eyes..which was strange for me..because i was using the same eyeliner combination as i had been for a while (and hadn't had a problem with) so why was it all of a sudden smudging under my eyes? so i stopped wearing eyeliner (gel liner with powder over it) on my waterline for a few days but the smudging kept happening! so then i considered all of the possible changes i had made previous to this smudging and realized that the only change made had been this new "eye brightener" so i stopped using it one day but still without eyeliner on the waterline and no problem! then i added the eyeliner back on the waterline and still no problem! so i guess the problem = this product. boo :(