Looking at the 1/8 mph numbers, they were all virtually the same, so the power level never increased. The 330 numbers were all over the place and this is where the differences in ET likely showed up.

Usually when you make a change and the mph does not increase, you are not getting the extra nitrous, or you are blowing through the converter.

It would seem you found the issue, with a kinked line. Going back to square one, is a good idea. When you make timing changes, I suggest a little more discretion. A 5-6 degree move is a ton. You need to be moving in the 1-2 degree range at the most.

Keep an eye on the bottle and keep it in the 950psi range. Also be a good idea to weigh it after every run and see how much you use. After it gets half empty, performance will fall off, due to dropping bottle pressure. Better to have 2 or 3 bottles with you for a track day.

Monte