Maps & Mapping For Role-Playing Games Reviews RPG & Card Board
There is no limit, what might be happening is your browser is caching the old image. Clear your browser's cache and / or reload and you should see it. Below is the image I see, is that correct?
Rather off topic, but...
You may want to look at this
as a means to create maps quickly. I am still interested in having an in-house map creating system but have not found one to my liking yet.