Laser Novice : Guidance Required

Hello Friends.. I recently have purchased a 1200x900, 80 Watt laser from G.Weike.. Got no complains about the machinery as such.. There had been few issues and had been sorted out.. I am a complete newbie when it comes to laser machine.. But I managed to learn a little of how the machine/software works without any reading.. Now i need expert's guidance for getting my job done more efficiently and effectively.

This machinery is mainly used for engraving in leather. And here are few issues for which I need guidance :
One of the leather shoe component(outside quarter) has to be engraved with JOOP! logo in it(picture attached). The problem here is, the logo has a box around it and when the laser engraves the logo, the 2 horizontal lines are more deeply engraved than the rest of the vertical line and the text.. This results in an uneven outcome.. If I increase the power and speed, The leather gets cut in the 2 horizontal lines but the rest of the engraving is good.. If I decrease the power and speed to adjust to the 2 horizontal lines and the rest of the engraving is bad.. Please help me with this.. The following is the setting I used for engraving:

I seriously don't know what this setting got to do with the engraving.. I just play with the speed/power to see if i get better results.. Please pardon me for my ignorance.. But what is difference between the raster engraving and vector engraving?? Is every machine capable of performing both raster as well as vector engraving?? If what shown in this video is right, then my machine does the raster engraving.. Here is how it does the job for me. As you see in the attached picture, I arrange the components in pair(10 pairs at a go). The laser starts engraving from the bottom of the table and it engraves 1 pair simultaneously, then moves up to engrave the next pair(something similar to old dot-matrix type printing. Iam not sure if this is the right way of doing the job. But it is the best i could make with this machine with limited knowledge of laser machine.

Later, I will try to post a video of how it does the job presently.. In the mean time, some views and guidance on this issue would be grateful.

Thanks

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