Complaints about Constraints! (and one about projected geometry too)

Okay, so I've got a couple issues I'm having with constraints, and I'm wondering if anyone else has the same issues, or any workarounds.

1. I've got my constraint placement priority set to Horizontal / Vertical rather than Parallel / Perpendicular, but I'm still getting the Parallel / Perpendicular constraints automatically created. Once in a while I'll get Horizontal / Vertical, but mostly the ones that show up are Par / Perp.

2. I'm still getting constraints showing up automatically even when I press CTRL. Doesn't matter if I use the left or right key on the keyboard, or the CTRL key on the Spacepilot - they still show up. I probably spend more time finding and un-f***ing constraints automatically created while holding down CTRL than I do creating new sketch geometry.

3. I tend to almost always project geometry as construction lines. Problem is, when I constrain to or dimension from that, about 1 time out of 3 or so, the dimension or constraint will ignore the projected construction geometry ... and project something new, and it will be normal solid-line stuff. This may or may not have any effect on the profile I'm sketching, but it looks really ugly, and it annoys me to no end to have all sorts of extra crap cluttering up my sketch.

Anyone else have any of these issues, or any solutions / workarounds for them?