I am a guy with short/medium length hair. I have been getting it relaxed for some time now.  Now, when my hair is wet, it is straight which I like. But when it starts to dry it poofs and curls.  It doesnt get as curly as my hair used to be.  Before relaxing, I had very tight curls.  I put mousse in it to keep it straight and to keep that wet look.

My question is: Is it normal for relaxed hair to look straight while wet, yet poof and curl when it dries?  Do I need a stronger relaxer?  My stylist currently uses Paul Brown Straight Perm, which is no-lye.  Thanks.