I have one more issue to add to the list.
In 1:1 and 1:2 I have a sublte 1/4 note and a less sublte .8 note Vintage Delay. When I switch from 1:1 to 1:2, there is a short but very obvious blast of static. It's loud enough to be heard over the guitar.
In case in helps, I run it in front of the amp.