I don't have problems like that, Bill, and it isn't natural for acrylics. I'm not familiar with Gunze acrylics but a lot of people use them and don't seem to have those problems.
It sounds like either the paint isn't thin enough, the thinner and paint aren't mixed well enough, or the paint is drying in the tip. Try thinning it some more and adding a touch more retarder and see if that helps at all. If it helps a little, keep going in that direction until you reach the point that it just isn't covering very well any longer, and then back up a bit.
I use Tamiya, Model Master, and Polly Scale acrylics and they never behave in that manner. For the Tamiya and MM acrylics I thin them with either alcohol or Golden Airbrush Medium. If I use alcohol I always add a couple of drops of retarder. The Golden medium already has retarder in it. For PollyScale I seldom thin them, but if I do I use plain old water as the bottle recommends. I usually thin about 3:1, but I'm not real accurate about it and don't worry a lot about the ratio. If it won't spray I up the pressure a little; if it's runny I drop the pressure a little. Also, like you, I keep a Q-Tip handy and wipe the tip off every time I put the brush down.
I don't particularly agree with the advice to go back to enamels, unless you find that those are what you prefer, but that's my personal opinion. Acrylics work very well once you get accustomed to them, and I personally would never go back. I like being able to clean up with water and mild cleaners, not filling my basement with fumes, and so forth.