[Dave D]

I think what he's actually trying to say is the floor forced him to call the 500 with 4000, instead of 500. This is standard.

What the dealer should have done is take 500 from you and the sb, and BB's last 500 and make a main pot out of it. Then he should have taken the rest (3500 from you and SB) and made a side pot and you keep playing. This is standard, go online and watch what happens in these situations.

But yes, there is no way you could just call 500.

OP, your original post is really confusing because you say "it's checked to the BB" but you don't say if you called (which I assume you did). Then you say he goes all in for 500, you don't say if it's 500 EXTRA from the BB.