NO-
This is simple.
Any amount of money due under the contract that is guaranteed is treated exactly as a signing bonus and amortized over the life of the contract (up to 7 years).
Any payments,whether roster bonus, salary or otherwise, can be guaranteed.
The only difference is that a true "signing" bonus is paid in year 1 upon execution of the contract. Guaranteed amounts can be paid at any time, but will be paid even if the player cut.