Sometimes a mishmash like that can occur in the first year of bloom in a plant that has not yet settled in. I had that occur with Sea Power in its first bloom in my garden. However, last year when it bloomed again, the blooms were well spaced. I am glad I gave it time to sort itself out. It's my rule now to give every plant three years to show what it can do.
A crowded mish-mash like that can be truly ugly. You can't even distingish where one bloom ends and another begins. The bloom form gets totally lost in the mess. So, good candelabra branching is very important for irises.
