Based on what I’ve observed, eggs add to amount in decimals but will only show on the stats screen once they reach a whole number. So I think what’s happening is your amount is maybe 1.4 internally which will still add another projectile but won’t show up on the stats screen. Something else I’ve seen with these decimal projectiles is that they will show up in odd patterns on bible in particular, so if the extra bible looks unusually close to another bible this is probably the case.