Do these typically have a negative impact on SEO?  I know this is kind of a vague question, does it make it harder to spider?  Are there SEO friendly ways of coding these?  There are so many sites out there that have these, so I've got to assume it's different on a case by case basis.

I have someone who's come to me and said that they have lost all of their organic keyword rankings.  They did launch a site redesign a few months back so that could be a reason as to why.  But after looking at the site, link profile, etc.  It doesn't look like they could have been ranking for the terms they say they were.  They have never implemented any SEO on their sites btw.  I did not build this site and have not done any SEO, they are coming to me to solve the problem.  I did notice in SEM rush that a couple months ago they were ranking organically for more terms (20 in July vs. 5 now), so they did lose some.  Is there any way to see what terms they WERE ranking for?

I re-wrote the page title of a home page for a site I'm working on and made sure it's under 70 characters (68 to be exact) to comply with best practices and make sure it doesn't get cut-off in the SERPS.  It's still getting cut-off though and right when it gets to the brand/website name.  Does a "-" have anything to do with it?  Does that translate to an elipsis? Format: keywords - website/brand.com Can anybody tell me why this would be happening?