Need Help to explain weird impulse responses.

Hi,

I am helping a friend to set up is 6.1 system. His speakers are all old Yamaha models (2005 issh don't know which model).
Trying to time align the speakers, I wanted to check if distances were correct. Looking at impulses seems kaput for me. Never saw that before.
Did I make a mistake taking measurements?
Did you ever saw this?
How to explaine it?
Is there a cure?
...
Will I lose my friend???

No only one at a time. Only 1 tweeter quite sure of that. It is not a high end system. Here what I found:

Yamaha - 6.1-Channel Home Theater Speaker System - Silver​

Model:NS-FP9500

• Number of Speakers per Package
  6 + subwoofer
• Maximum Power Handling
  120W per channel
• <a href="javascript:winopengld('1087340578114','pcmcat38200050027','cat12080')">Frequency Response</a>
  100Hz - 40kHz
• Tweeter Size
  3/4" dome
• Midrange
  4" pulp cone
• Subwoofer
  8", 130W
• Woofer
  4" pulp cone
• Connector Type
  5-way binding posts
• Magnetically Shielded
  Yes
• UPC
  027108103860

I am just an amateur. Those impulses seem to say that the speakers internal circuit is broken? Even I can get a SPL graph responses? I can't find where is the impulse of speakers other than center?.

Does impuls indicate broken speakers?

here it is

our posts crossed I think

All The speakers are placed at the worst place possible in his room very near a wall for all except the center., WAF factor...
Maybe bad connections to the receiver or the speakers?

We will try 2 desktop speakers next week and learn !