As for koth_blackport, I would just trash that map cause it is so outta whack that it'll take longer to fix than to start over new. Just try to learn how to do a skybox instead of making your level huge cause have stuff around it. there is so much open space and water to render and displacements going through water and i'm sure you might have func_detailed a displacement cause there are so many and they are soo.... everywhere.
ctf_sattelite i'm not to sure about.. the only thing i can think of is that there is obviously something not sealed right, or something is escaping into the void and thus stopping it from compiling correctly.
arena_snowlands i'm not gonna even talk about cause your computer prolly just can't handle recompiling a valve map with different textures.
arena_construction func_detail your stairs! you have no idea how much of a pain it is for hammer to have to make visleafs when you have... over 100 stairs in the same area. somethings gonna give out or break when there is stuff like that going on.
arena_town_faceoff is just another horribly constructed map. you need to take more time and look at how your brushes are fitting together and whats up with the gigantic hint brushes that are 6600 units tall and 4200 units wide? that's doing absolutely nothing for your map and might possibly be breaking stuff.
Final note: After looking at your maps. It's almost as if you made stuff wrong on purpose in order to get some attention. I'm not saying you did, but the mistakes are so blant and obvious and you would figure with how many maps you've made that somewhere down the line you would have caught on or realized from looking at other maps that your doing stuff wrong or ways to fix/properly setup stuff. That's just my 2 cents though. Take it or leave it. Some people are just not cut out for mapping, no matter how hard they try they can't get the concept on how to do stuff. Maybe take some time, sit back, work on ONE map and put full strategic effort into it. Make sure you don't have brushes that are overlapping, make sure your using the proper triggers and they are sized right with the proper I/O's, make sure your not throwing weird sized or ridiculous brushes that make no sense in the middle of no where hoping that they will accomplish something good. learn to use the vertex manipulation tool and the displacement tool there are plenty of tutorials in this forums on how to do so.
Now that my hammer is terrified since I had to open those things in it, I must go settle it down and open up one of my neatly constructed maps and tell it everything will be okay, stroke it's head and give it a cookie. I hope your happy! =P