First of all, a plain reading of the text doesn't state there are gaps, anywhere. This is probably why pretty much everyone read them as plain, unbroken, gapless genealogies until the evidence showed that they couldn't be literally true (and hence the new idea of "yalad"). That's why there has been clear historic agreement on the date, and hence this being the Jewish year 5776. You have called nearly all of historical Christianity as well as Judaism "dishonest".
Secondly, and just as importantly - positing gaps doesn't help, and still leaves one hopelessly out of step with the evidence. One is still left with either deciding the OT genealogies are symbolic/metaphors vs. denying evidence. The evidence shows that humans have been around for at least 100,000 years, so if there are "gaps" in the 5,776 year chronology, then those "gaps" would have to account for over 90% of the time! So you are saying that the genealogies are 90% gap, with less than 10% of the time mentioned?
It gets worse - the evidence shows that the breeding population of our species was never just two people, and that the flood and many other Biblical stories could never have happened literally. The evidence also shows that there have been no humans for 99.9998% of earth's history - yet if one puts "gaps" in the genealogies to fill up the time (and keep creation week as 1 literal week), then humans appear after just 0.00002% of earth's history - the complete opposite. And the authors suggest that this is supposed to reconcile a literal reading of our scripture with the fact that droves of people are leaving the church due to the denial of scientific reality? Even allowing for longer "days" in creation week doesn't come close to agreement with the evidence - though if you've got some other approach that does help us stay in agreement with the evidence (as theistic evolution already does), then I'm all ears.
In Christ-
Papias