recently i got my first printer, built it up and had some fun!

but i always wondered, why the x-axis isn't using the x-min sensor and always moves to the RIGHT when homing.
then i wanted to print the first numbers, words "happy birthday"-signs and stuff, but they are all INVERTED.
i just updated the firmware just in case, but still the same problem!!

any ideas please!!
maybe i put some wires wrong? i'm out of ideas...