The only problem is......
You have presprayed with a product with a Ph of 10.5 and then extracted with a further alkali at 9.8. The carpets are now full of alkali residue.
If you return to clean this and carry out the same procedure the alkalinity will be off the scale. How about using a rinse in the machine. If the Ultrapac Renovate has carried out the "loosening" all the areas would need is a rinse to bring out the soil and oil bond film.
The best way of testing this would be in a side area, then a high used trafficway and look at the result.
Regards Gary