I'm guessing that this means two are being fed from the first. This is way more loss than you need to have.
I'd have them come back and use "smaller" splitters to gain resistance against rainfade.
The SWM output and the receiver's input levels shouldn't have more than around 25 dB of attenuation and an 8-way to an 8-way eats all of this up and some more, so you've lost all your "system reserve" for weather.
Unfortunately, some out there still think that in order to have 5 to 8 TUNERs you need an 8 way splitter. This goes from installers, to stupidvisors to trainers (oxymoron).
Sometimes, you just can't fix stupid.