I suppose, you observe an effect resulting from Kerning metrics. Usually, when using fonts, the distance between two glyphs is not limited to the width of the affected glyphs. Even if two glyphs have equal width, there are further font specific metrics affecting their distance. Kerning is one example. We added Kerning support in version 9.10.
Unfortunately, the Kerning metrics can not be disabled in the actual version. I would thus recommend to try another font. We discuss internally the possibility to enhance Embedded Wizard by additional options to switch off kerning metrics.