Okay this is the thing...

Your son is 17...no matter what they say ("I don't care, mom") trust me...this will stick with him.

If I thought there was the slightest chance that your relationship might last a while (and clearly, there is) then your boyfriend is setting the stage for how he will be viewed by your son.
Yes...it's a small gesture. Yes....it matters.

I would tell your boyfriend to "order" something (surely you can do that at this point in the relationship?) and make the excuse that it didn't come in time....you can do the legwork if you want and you don't mind. Not the best solution, but one I would make happen.

Sorry. I'm a fierce mom.