When summoning Armorstands with custom names, adding the tag Marker:1b (or :1) will not produce a marker armor stand, but rather a regular armorstand with the customname at its feet. The regular armor stands in the picture do not have the marker tag.
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duplicates 1
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Sorry everyone, didn't realize this was working as intended. Never used a "true" argument in NBT before.
WAI. MC-76592