Kurai,
Since Daniel hasn't been diabetic long, he may just be making progress very quickly. Take a look at Gracie's spreadsheet. She was high and all over the place, then all of a sudden started dropping. We went down the dosing ladder VERY quickly, and she was off insulin just a matter of weeks after having high numbers. What's happening with Daniel is actually a good thing, it's just that you've had things happen so quickly. He never got below 50 on 1u, so going with .5u was the right thing. Now that he's going low on .5u means backing off again is the right thing. It never hurts to start very low and work your way up if necessary. You may find that he responds very well at the lower dose, and worst case, he has safe numbers while your away and you can raise his dose gradually.
Hang in there. His numbers are very good even with the difficulty finding the right dose. It will only get better when things settle down. Again, take a look at Gracie. I had given up all hope of getting her regulated quickly, and Bam! It happened virtually overnight.
Jason