Looking at the CBA from NFLPA the sections in question would be these two:

(ii)
(1) Acceleration.
For any player removed from the Team’s roster, or whose Contract is assigned to another Club via waivers or trade, on or before June 1 in any League Year prior to the Final League Year, or at any time during the Final League Year, any unamortized signing bonus amounts will be included in Team Salary for such League Year, except that for each League Year preceding the Final League Year, each Club may designate up to two Player Contracts that, if terminated (i) on or after the first day of that League Year; and (ii) on or prior to June 1 and if not renegotiated after the last regular season game of the prior League Year, shall be treated (except to the extent prescribed by Section 6(d)(iv) below) as if terminated on June 2, i.e., the Salary Cap charge for each such contract will remain in the Club’s Team Salary until June 2, at which time its Paragraph 5 Salary and any unearned LTBE incentives will no longer be counted and any unamortized signing bonus will be treated as set forth in Subsection (2) below. If acceleration puts a Team over the Salary Cap, the Team will have seven days to conform with the Salary Cap, but may not sign any players until there is Room to do so under the Salary Cap.

(2) For any player removed from the Team’s roster or whose Contract is assigned via waivers or trade after June 1, except in the Final League Year, any unamortized signing bonus amounts for future years will be included fully in Team Salary at the start of the next League Year.

(3) In the event that a player who has had a signing bonus allocated over the years of his Player Contract is traded, or whose Contract is assigned to another team pursuant to the NFL’s waiver procedure, the Team Salary of the player’s new team will not include any portion of the signing bonus.

and this:

Traded Contracts.
(i)In the event that a Player Contract is assigned to another NFL Team, either by trade or pursuant to the NFL’s waiver procedure, the assignee Team will count as part of its Team Salary only that portion of the player’s Salary which remains unpaid and for which the Team may be obligated. The assignor Team will continue to count as part of its Team Salary only that portion of the player’s Salary which has already been paid by the Team and/or any Salary for which the Team remains obligated.

(ii) Subject to the requirements of Article 9, Section 3(h) of this Agreement, a Club is not required to have Room to execute a Player Contract with a player who is subject to any Required Tender permitted by Articles 8, 9, or 10 of this Agreement at the time the Player Contract is executed if the player is assigned to another Club via a trade on the same business day as the execution of the contract, and the assignee Club has or makes Room for such Player Contract.

I can see the confusion now. It is based on how the "Option Bonuses" are classified because they were not a signing bonus but are guaranteed and basically will always be paid. I always thought it was how you analyzed it, until I looked at the Spotrac website. I'm not a lawyer, so I'm not sure how to interpret the language for that accurately.

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