[MWS] [LD] Guests not wearing formal/specified attire at wedding/funeral

Did you never use mods or removed them ?

Could you post a screenshot of your window to pick ?

(I’m not OP)

Playing on console (mod free guaranteed), I ratify that attire selection in the Marriage Ceremony configuration screen is limited to BoHo and Polished — having more options would be a boon. 
In my experience, not choosing an option made the guests arrive in their Everyday clothes, but whenever I pick either BoHo or Polished, they appear in randomized clothes (both with or without a color scheme).

Was that always the only choose or were there more before ?

For me, that’s always been this way since day one, only two attire options for guests. 

Man, if I had known this was a thread, I would have taken screenshots.  I just had a wedding event about 20 minutes ago and noticed the same thing...and I noticed that my  guests (who were part of my household) were wearing formal (as I didn't choose an attire style because the two choices were greyed out, also, I didn't like those options anyway)...but they weren't the formal outfits that I had planned for them in CAS.  Even when I tried changing the outfit at the wedding event, they  still wore the same randomly generated one.  The OTHER guests - who were NOT part of my household- wore random outfits...some even had HOSPITAL GOWNS on!??

So I don't think the part where you only have two options is a bug as it seems it's always been that way but I found a bug report for the formal attire issue in the bug archive.

Using this for that issue.

Absolutely! A workaround I used the last wedding I planned was using the friendly small talk interaction to ask the guests to see their formal outfits. That “fixed” the random outfits, but having too many guests render such “fix” impractical. 
There was this one time, though, when RNGeezus blessed Summer Holiday and she wore a gorgeous formal outfit. 😆 

Guests show up to weddings in costumes (dad was a mailman, mom was a star wars character, etc) no matter what I set up. I didn't like spending half the events trying to ask for outfit changes, and have stopped throwing wedding events because it's such a mess.