"2x4-10' Fir" shouldn't increment, but ctrl works

imo In a column formatted as text, a cell with 2x4-10’ Fir when dragged should not increment to 3x4-10’ Fir, but it does. Nor should 5/8" CDX increment to 6/8" CDX. No biggy cause there is ctrl-drag. But it shouldn’t in my newbie opinion.