Two things are bundled here, and they land on different sides of the rule.
The shared central IP isn't the core problem by itself — Zerodha has said the mode of obtaining a static IP (ISP/VPS/etc.) isn't specified. But IP sharing is only sanctioned …
Yes — your reading is correct. Each slice is placed as a separate order with its own order_id, and Kite stamps the autoslice tag plus an autoslice: tag on the slices (staff have confirmed this in the earlier autoslice threads). So your own tag can't…