I don't understand this.

"the content gets skewed like the widths are not the same in both Zones"

Skewed typically means gets dragged in an angled direction.
Dictionary: "suddenly change direction or position."
I don't think that's what you mean.

"like the widths are not the same in both Zones"

I'm not sure why they would be the same, if panels are different.
I'm also not sure why it would be an issue, as it's presumably not going to have to show in both situations at once, so normal layout and templating would be used to set the layout desired.

"In the Site Zone, both side panels move with the page but it's only the right panel that moves in the Welcome Zone."

I think by "move with", you're referring to what happens when you do vertical scrolling. I'm not sure what that has to do with widths or skewing though, and I'm not aware of any difference. Likely your site just has a tall panel that can't all display on the screen at once, so Composr won't try and sticky it.

Yeah skewed wasn't the right word. I simply meant that default catalogue image grid is displayed different in both zones (fits better in Site than Welcome) despite the side panels being the same width (I would assume). If someone created something in Site then changed to to Single Public Zone it may not display the same and I assumed the layout would be the same regardless of zone.

If you can attach a pair of screenshots that may help.

(Click to enlarge)

(Click to enlarge)

Uploaded, ignore welcome_zone.png, that's actually the site zone view again :P

If the Single Public Zone option is off, more space is given around the right panel due to this CSS rule...

/*{+START,IF,{$CONFIG_OPTION,collapse_user_zones}}*/
.zone_running_ #panel_right:first-child ~ .global_middle { /* If no left panel on welcome zone, lets give some extra space */
margin-{!en_right}: 16em;
}
/*{+END}*/


This is simply because a splash page probably is going to be more sparse and wanting to make use of more white-space.

So there's no bug here, simply the default styles dictate more space on the welcome zone.

Okay, I was just reporting the scenario where someone switches from the default to single public zone after they've set things up to their liking and finding that it doesn't display the same (which would be expected imho). It's not a major thing, I wouldn't have assumed it was a CSS rule and I still don't fully understand what Collapse User Zones even means/does. I assume it would remove the panels like in other software (but they tend to just hide them via a toggle in my experience of other software). I just thought the welcome zone should follow the styling rules of other zones, I am happy to accept it doesn't just not entirely sure why it wouldn't :)

Actually, you're right. The rule was targeting when collapse zones was on, when it should have targeted when it is off. I've just removed it.
It only applies when there is a right panel and no left panel.

Collapse zones ("single public zone" option) is when the welcome and site zone are automatically merged by Composr - i.e. there's no visibly separate site zone, and all the site zone pages run from the welcome zone instead. It's not actually really anything to do with panels.

I would never have considered Single Public Zone and Collapse User Zones to be connected things (based on the different terminology, maybe Merge Default Zones would be more fitting). I understood collapse as destroying the supporting columns (sidebars) in zones for a full width view, lol :)

Yeah, that is confusing. The config option was implemented before the final 'Single Public Zone' label for it was decided. I'll make it consistent in v11.