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Nibal,
Technically the system is checking for errant pipes in the drawing, and will catch most of what is going on, whether that is with circular pipe references, valves not connected to mainline, etc...

However, the system needs to allow for open ended pipes, in case it is leading to drip areas, etc. So unfortunately, the fact that there are poorly drawn pipes in section of the drawing, there will need to be some next level troubleshooting that needs to happen in order to identify what might be going on. In most your examples, these issues seem to be stemming from piping to these emitter areas. Small pipe segments, with arcs, with manually thickened lateral lines.. In my opinion, this is causing the perfect storm for these errors to slip through the systems cross checks.

Utilizing the additional tools (Highlight, move equipment, etc) that I have previously recommended you use will be your best bet on fixing these problems for now.