Illinois police pension taxable on Alabama state income?

Last year I moved from Illinois to Alabama and now receive a pension from my former Illinois police department's plan. Prior to moving, I researched and saw multiple articles showing that police pensions are not taxed in Alabama. While completing Turbotax I checked the box that the police pension was received while an Alabama resident, but was not from the Retirement System of Alabama (RSA). My form then shows that I owe income tax on the pension received. The Alabama Department of Revenue website lists, 

• "All retirement compensation received by an eligible peace officer or a designated beneficiary from any Alabama police retirement system."

To clarify, did I miss this and I actually owe income tax to Alabama because my pension is not administered via the RSA? Thanks for any help in clearing this up.