5 stud bodog structure?

[mosta]

Is this normal? Bodog, 5-stud, 2-4, I make trip deuces on 3rd
and this guy doesn't believe me (even though I opened
for a completion). I lead for $2 with my open pair.
He raises it to $6 (not $4)! I can call or make it $10! (and
it's not PL or NL)

is it supposed to be like that? or is this a programming error?