1993 Chevy S-10 clucth

I just recently changed my slave cylinder on my 1993 chevy s-10 2 wheel drive 2.8 liter engine 5 speed it has a 91 model slave on it after I changed it I tried driving it if u keep the clutch pumped up it holds good pressure but the bleeder on the slave is leakin fluid alittle bit. It shifts good if u pump it ever time u stop but if u just get in and go it is hard to shift can that small leak cause me to be getting air in the line again and making it difficult to shift. What should I do get another slave or what? And exactly how do u bleed the slave system we worked on it for about 30 min or so and thought it was blead but does it sound like there is still air in the system? Please help.