short - קצר - is used when talking about the length of something (this is a short skirt - זו חצאית קצרה), the opposite of it, long, is ארוך (for example, she have long hair - יש לה שיער ארוך).
short - נמוך - is used when talking about the height of something (isn't he a bit short for his age? - האם הוא לא נמוך מעט לגילו?), the opposite of it - tall - is גבוה (for example, this is a tall tree - זה עץ גבוה).
masc singular - קצר, ארוך, נמוך, גבוה; masc plural - קצרים, ארוכים, נמוכים, גבוהים; fem singular - קצרה, ארוכה, נמוכה, גבוהה; fem plural - קצרות, ארוכות, נמוכות, גבוהות.
What I had in mind is the situation where woodworkers are cleaning up the forest. They pull out of the forest the trees which they have cut and are storing them horizontally, waiting for a truck to collect them. And it happens that one of the trees is much longer than the other ones...
It happens with extreme weather conditions or really old trees too. I have seen it for another reason, the tree roots spread so far that threatened underground utilises & structures (plumbing, electrical & housing). We had it done because of the health of tree & it's size there was a worry it would crash into the house.
Why does the recorded audio voice make it sound like being short is a bad thing? The vocal inflection of this phrase stands out and as a result differentiates too easily from the phrase translated "she is tall" - meaning simply that one can tell these two phrases apart just by the different inflections.