Robot can not move mouse to negative coordinate correctly (problem with negative X coordinate)

Snippet from log file:
Expected location: X: -1590 Y: 10
Current location: X: -1600 Y: 10

Unable to move the mouse using Robot created for a specific GD within the specified screen on a multi mon independent screen configuration. Failed for coords: X: -1590 Y: 10.

Test suite: 2d
Test: 2D_MultiMonitor/RobotMultiScreenTest
Regression: no
Reproducible: always
Product: FAIL on jdk 7. PASS on jdk 8, jdk 9.
Steps:
1)setup you displays as shown on attached image
2)export DISPLAY=:0
k:/tmp/andrey.rusakov/tools/jin.sh -64 7u91b10
k:/tmp/andrey.rusakov/tools/jin.sh -64 7u71b10
mkdir -p C:/junk/
cd C:/junk/
echo "test.case.name=RobotMultiScreenTest
2D_MultiMonitor/Automated dtonga \"pit,RobotMultiScreenTest\"
" > my.testlist
k:/ute-dev/bin/ute run -harness tonga -component 2d -jdk c:/jdk/jdk1.7.0_91b10 -stablejavahome "c:/jdk/jdk1.7.0_71b10" -env "BASEBUILD=c:/jdk/jdk1.7.0_71b10" -testbase K:/testsuites/170_int_ws/2d -testlist my.testlist -results . -vmopts "-d64" -env TONGA_REMOVE=none -aurora_collect_system false -aurora_collect_jre false -aurora_collect_jes false