Drag and Drop resize asked picture and prévious ones

Hi, I'm starting using picture resize and I have a problem:

My configuration:

A shortcut :
Target : C:\PhotoResize1500G.exe -o -c "c:\toto"
Start in: C:\toto

When I drag and drop a picture like : test.jpg
It convert to c:\toto\test-1500.jpg

At this time all is OK

Then if I convert another file : toto.jpg
It convert to: toto-1500.jpg
and it also creat à file named test-1500-1500.jpg (another convertion of the previous image converted.

And If I convert another file like : titi.jpg

I have now all this files in c:\toto:

test-1500.jpg
test-1500-1500.jpg
test-1500-1500-1500.jpg
titi-1500.jpg
toto-1500.jpg
toto-1500-1500.jpg

So 6 files for only 3 drag and drop !

Any idea ?