I think you misunderstood what Shefter was trying to say. I also believe the 2006 bonus/salary figures are the opposite of what Reiss reported. $1M SB and $4M salary is what PFT said and I believe what Schefter said last night as well.
The Pats offer was $7M for 2006 and $2M (plus apparently $2M in incentives Shefter didn't mention) for 2007. Or 2 years $9-11M with only the first $7M guaranteed.
The Chief's offer was 5 years $30M (sounds better to a pro bowl corner right off the bat) with $5M in bonus and salary in 2006 and $5M in salary in 2007. Or 2 years $8-10M ($8 being guaranteed because making the 2006 roster guarantees $3M total of his 2007-2008 salaries) and a shot, albeit a long shot, at some or all of another $21M or so in 2008-2010.
So really it was just about another $1M being guaranteed over the first two seasons since the Pat's were prepared to give him $2M more up front. They likely could have matched or trumped this phony deal but then would have had to do the lied to me dance again in 2008 if Ty was still remotely productive and not ready to retire. $21M for 3 more years as a safety is a little steep to say the least. KC will be the liars this time out, but their bigger concern was giving Herm a little PR boost (and made to order fall guy if things don't work out) at the reasonable short term cap cost of $4.2M this year and $5.2M next year, or if things sour quickly dead cap hits of $1.9M per in 2007 and 2008. And if 2006 and 2007 go OK but they don't want him back at all thereafter their dead cap will be $2M divided if they choose over 2008-2009. At least that's the way I decipher it.
The Patriots must have had concerns about Ty's ability to play more than 2 more years as a corner or safety, probably centered on that ankle and a deeper long term understanding of his physical condition. He did limp throughout 2003 (albeit effectively) before the traumatic injury even occurred in 2004.
It appears the Patriots deal was just what the sources had indicated from the outset - a desire on the part of the team to have him return for a year or two and retire a Patriot. Ty is also apparently not nearly ready to wrap himself around the retirement scenario. We'll see who had the better read come late 2007.