Male Fashion Advice

I just received an order for a few shirts from LL Bean. Right now, any brand's Large is just a tad tight on me but I'm trying to lose weight and expect to squeeze in soon. These shirts are HUGE.

I double checked their website's fit guide. By all accounts, it's suggesting I'm a large (5'6" 43 chest). The long sleeve shirt is one size too big, the short sleeves are at least two sizes, if not three, too big. The sweat shirt is a bit large but wearable.

My plan at this point is to take the nearly two hour drive (with traffic) to my nearest store to try the shirts on in person. Just wondering if I got a weird batch or if I'm a size small in LL Bean.

Or, should I be expecting these to shrink a lot in the wash?

UPDATE: So, I drove the store and confirmed my suspicions with the associate. “Traditional Fit” is two sizes bigger, “Slim Fit” is one size bigger, and “Signature” is about right, he said.
I didn’t like the signature sizing at all; it was oddly a little smocky and ballooned out at the bottom. And while the small traditional fit fit my width okay, I think it’s a little short, and I’m just 5’6”.