100% inaccurate statement. For each particular market maker, they only show the lowest price being offered by THEM on the ask side of L2.
For example, let's say there are sellers using the Market Maker ETRF at .02, .023, .025, and .028, you will only see the lowest of those sell orders (the one at .02) on L2 for that one particular Market Maker. They will not show the sell orders at each level.
So whatever MM I'm using, there are other sell orders between the current ask (which is currently .0062) and my sell order sitting up at .0085.
My order is sitting there, but you won't see it on L2.
If what you said is accurate, you'd have 7 MM's showing at every single price level on Level 2.