Reject Applicant score?

[Chris Maddox]

Just used NTNonline and ran a credit,eviction and criminal background check.
The 3 plan on renting the house together we have for rent.
Well 2 of the potential tenants got a 93 and 96 score, the other got a 68 score.
The one with the bad score said it exceeds requirement on time at the job,
as well as income and time at current residence.
How could they get a 68 score and rejection letter?
I already verified there work and income with pay stubs going back many months.
Should i not worry about the score or what? shows no eviction or criminal background for them.
It has a bankruptcy back in 2003 and some dispute on there as well.
Guess it's time to start calling previous landlords or something.
On our lease application she only put down her current place.
As well she used her emergency contact as previous address as well was all.
Hope someone can help me figure this out,Thanks