List order mess-up with cfc and ajax

What's the odd ball.  Form has dynamic elements with each starts with the letter of "A" (e.g., A1, A2, A..n) among other elements, form is passed to cfajaxproxy/cfc/js combo and submitted multiple times (specifically submitted at each element level, intended). On the cfc end, partially code looks like this: <cfset AList = ""> <cfloop item=i collection="#arguments#">              <cfif Left(i,1) IS "A">   <!-- or <cfif Left(i,1) IS "A" AND !ListFind(AList,"arguments.#i#")> --->      <cfset AList = ListAppend(AList,"arguments.#i#")>    </cfif>   </cfloop> ListLast(AList) does not always return the last appended item, how come? Envs: OS = Windows XP; CF = CF8 Stardard. Thanks.

Resolved by using another technique.