core xy moving strange on axes

sz3bbylA

i just build a ed printer core xy
I try setup my firmware with repetier config tool
very strange is after some testing i was shocked by this:
when I move printer on x positiv - is moving normaly
when I move back on x axe the head is mooving on x and y (theory say must turn in the same position like before)
the same think is happend on y
I cannot explain more
i used config tool 1.02 on website

Repetier

Check endstops are not triggered with M119 also make sure you have selected the right core xy system.

sz3bbylA

no
with old arduino software like that from raspberry pi (i think is 1.6) compiled is working correctly
if i compile with new one 1.85 is happend this
also i can not compile new version of repetier 1.02 on raspberry pi because of fat file problem and if i compile with new arduino 1.8 which not have this problem with fat file then obtain this movement
if move x+ then is moving on x
if i move x- then is moving on x and y
the same on y
moving y+ is moving on y
moving y- is moving y+x

Repetier

Yes, 1.0.2 requires in deed 1.8.x as it handles subdirectories different to older versions.

You did not provide the endstop results for 1.8.x
Moving x and y means one motor moves one not and that can be from endstops. Maybe config for 1.8.x is not correct with respect to endstops.