I noticed that myself, but, after many years of using Eagle, I have come to appreciate that feature. Stock parts sometimes automatically creates a connection to Vcc or Vss if the pin shares that name. In most cases, that is a good thing, but on some occasions I do not want that connection (e.g. different versions of Cypress PSoC chips have the same pinout with the exception of Vss being SMP on the same pin). By leaving the connection unrouted, I can make the proper wiring without having to create a part variant.
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The trace that snakes it's way from T3 to T4 goes very close to the solder pad for R9 and the trace from T4 that runs 'south' under R2 is way too close to the solder pad of R2 - doesn't look like a viable layout to me.
I have correct that board and give now the whole picture for clarity, it is a test board with a cascaded 6n9 tube stereo (both sections) I always use double boards with a lot of ground, better and more dense boards.
Normally I get a error when connections are forgotten, eagle give no error when I do delete a bunch of connections!!!!, ultiboard do see it when I do this there, can not make mistakes there, I did al tests in eagle, and all give oke while it is not, I have to trust that I do not miss connections, I think multisim ultiboard is a lot better and easyer, except the library,s who are not so consistent.
Board 2 is a speaker measurement Jigg who have a class B amp and opamp buffers, for connection to the pc audio, class b amp is 10 watts max no heat because of class b, for measurement this is fine amp.
regards
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