I don't know whether to post this here or in the forum on mechanics but I am experiencing 2 problems.
I am posting this in both places, sorry about that.

First, after about a year with my Bianchi Eros with Veloce/Mirage mix I found myself locked in the hig gear a number if times. First happened after about 50 miles in the rain.
After maintenance it happened only once in a while.

I upgraded so the bike now has Centaur derailers and shifters with Veloce and new cables. I took it out for the first time after the upgrade and found 2 problems. I am taking it back to my lbs so they can correct them.

The one problem I now have is no matter which of the three ring up front I am in, when I am in the smallest rear ring it locks up. I can not change the rear derailer. When I tried down shifting I did notice once that the cable appeared loose not taught going down to where it goes under the cranks.
The new problem is when I am in the largest ring in the rear it doesn't seem like it is sitting right, I mean its like its skipping sometimes while pedaling.

Its like having a 21 speed bike instead of 27 because I am okay if I stay off of those rings.

Anyone have similar experience before or have an idea what might be going on?

Thanks