Spanish to English Medical Psychology mental, emotional history form

So I have seen this on many numerous times on psychological examination forms, and have always translated the option of 'regular' (in Spanish) as 'normal' in English... But I don't understand why the option exists at times, such as in the following example. Am I missing a broader idea of it?

() Tengo hijos Cuantos? ________
La relacion con ellos es: () Ninguna (x) Buena
() Regular () Mala

Okay. So how can the relationship be good OR/AND normal?! Wouldn't those sort of be the same thing (if we assume good to be status quo/normal)?
I can't find my other examples of it right now, as this is the document in front of me, but suffice it to say they work nearly identically: options for good, bad, normal/regular, and none.
'Ordinary' o 'average' sean mejores? Todavia suena fea asi a mis oidos. Like ordinary or normal or average is a bad thing, in comparison to 'good.'

I think that normal is a good translation, it just annoys me that that doesn't make complete sense to me, so I thought I would finally ask.

Gracias in advance. :)