I have your fish's twin. But mine is smaller. Yes the nose is snubbed. It has an odd habit of standing on it's face. I thought it was was a case of self nose abuse.
I think they are sailfin plecos. Mine doesn't seem to clean the glass. It doesn't even try. It's mouth seems misshapen as well. ( maybe part of the squished nose syndrome.) Whatever it is, you are not alone. I love plecos