it sounds like all of your conditions are ok, just that your space is too limited for the plant. its no problem really if your mother plant is shooting out 1 blade leaves, it really just means your plant is under a bit of stress and is trying to get more light any way it can. clones taken from this mother won't inherit 1 blade leaves, theyre just an issue of space/light/stress. any clones taken with 1 blade leaves should be fine as well. after proper care and rooting should produce new healthy normal sets of leaves. no worries