Has anyone else noticed a problem with the file name when saving in Sketchbook Pro?

When working on a new document instead of saving as untitled.psd it’ll grab the name from the file you’ve previously worked on (despite it being a new file) and will save that file under that name.
Surely it should save as untitled? Is this a bug or a feature?

From 3d Studio R4 through to 3ds Max 2008
Windows XP (SP3)
Pentium 4 CPU 2.8 GHz, 3.0 GB RAM
ATI Radeon X300 series, DX 9.0c
Coffee: Almost empty

I don’t think it’s a bug - but now that you ask, who knows! It adds a 1 or 2, etc. to the last filename used, a bit like an iterative save except you have to do a Save as..

I don’t mind the file iteration (adding 1, 2, 3 etc) but after giving it a file name to save under it’ll revert to the previous name in a save (ctrl + S) which I find a little annoying as there’s a possibility it’ll overwrite another file.

From 3d Studio R4 through to 3ds Max 2008
Windows XP (SP3)
Pentium 4 CPU 2.8 GHz, 3.0 GB RAM
ATI Radeon X300 series, DX 9.0c
Coffee: Almost empty