Verizon Architect interview questions

1st typical HR interview. Then video interview with hiring mgr. The hiring mgr was busy checking his phone during the interview. And he was asking a number of "how to" and "why" questions and to be honest, it seemed the guy was trying to some idea how to do certain things. No feedback after despite I sent 2 follow up emails.

The interview process was typical until we got to compensation. Working in 10+ different companies I have never had to prove my income that I provided to the recruiter. At Verizon they have a third-party that does background check including income verification for your current employer. They use other third-party source(work something?). To make a long story short my base compensation is more than just salary and the third-party verifier was only able to verify my base salary. I provided information to the verifier and Verizon to substantiate the additional income. However, since Verizon doesn't offer that type of income source they don't count it as income and now my compensation number I provide is off by several thousand dollars. Worse the recruiters do everything by email and there is no one to discuss this to arrive at a mutual agreement/understanding toward resolving the issue. All of this is after receiving an offer letter and a verbal agreement to accept the position. So my note to anyone is to check for successful closure on the drug test and the background check(above) before providing your notice to your current employer. Otherwise, you could potentially not have a job that you thought you had.