Programming Issue Question

I ran into a weird problem, not sure if I missed something or if there's an interaction issue. There's a List of specials to be processed, but sometimes those create new specials that get added in the other functions. I wanted to add a slight time delay between those, so I put in a boolean and used an Invoke statement.

The problem is, when I switch to the IF statement that's commented out, it causes an endless loop. I've isolated the issue to this group of commands/functions.

Code (CSharp):

1.     public List<Special> specials = new List<Special> ();
2.     private bool specCD = true;
3.  
4.     void Process ()  {
5.         RemoveMatches ();
6.         do  {
7.             RemoveSpecials ();
8.         } while (specials.Count != 0);
9.         Invoke ("ReloadMap", 0.45f);
10.     }
11.  
12.     void RemoveSpecials ()  {
13.         int sc = specials.Count;
14.  
15.         //if (sc != 0 && specCD == true) {  
16.         if (sc != 0) {
17.                 //Process the list of pending special tile effects
18.             for (int e = 0; e < sc; e++) {
19.                 if (specials[e].z == 1)  Stuff;
20.                 if (specials[e].z == 2)  OtherStuff;
21.             }
22.             specials.RemoveRange(0 , sc);
23.                //Clear out just the specials from when this loop started
24.             specCD = false;
25.                //Start the cooldown delay
26.             Invoke ("SpecialCool", 0.5f);
27.         }
28.     }
29.  
30.     void SpecialCool()  {
31.         specCD = true;
32.     }

(I'm sure there's a cleaner way to process delays using Coroutines or something, but I'm not familiar with those yet, and the Invoke delays have been working so far, especially since this is a linear series of functions.)