Second Coat of Latex Stain
I painted my deck last year with Behr stain, water based, but looked like paint because I wanted color. Later I noticed that some of the boards seemed like they didn't get as much coverage. So the next day I simply added a second coat on the spots and the boards where I felt it was too thin. It still looks great over a year later and I never had to deal with any sticky spots. I would just add a second coat after it is thoroughly dried on the spots you feel need a bit more.