Rhinetone swarovski shirts

I was recently creating this custom rhinestone swarovski t shirt design for one of my customers when I realized the design looked really familiar.  I had created this exact design for someone else about 2 years prior.  It was an amazing occurrence .  What are the chances that two different people would order the same rhinestone swarovski shirt design?  I thought the chances were pretty slim so I had to contact my customer and ask them about this coincidence.  They said that they had not ordered a rhinestone designed shirt before.  Now I was stumped.  This wasn't your everyday rhinestone design like a crown tiara, or a shamrock.  This was a unique design with the persons name and everything.  Well I after going over and over the coincidence I finally gave up and figured it was just an act of fate.  Sometimes things happen for a reason and sometimes there is no reason at all.