Mod and Transparency problem?

I just wanted to make a baner rotator with changing banners by transparency but I found following issue:
Condition 1: Always
Action: Add 1 to Alterable Value A( "Active" )
Condition 2: Alterable Value A( "Active" ) mod 10 = 0
Action: SetSemiTransparency of Active to SemiTrans( "Active" )+1

In theory it should be changing the transparency similary to every 00"05 but it doesn't do anything.

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I just tested it a bit and it also wasn't working eighter on Every or in EXE build but after adding one additional condition like flag 0 is off it works perfectly, a bit odd.

Can you not just reset it to 0 if it is ten?

Maybe replace always with 00:01. It's usually equivalent to 00:02.

Still the problem is solved. And I managed to get quite nice looking rotator banner but still this thing a bit worries me that I need additional control condition for it - like the flag.