Getting the same problem in both ruby and javascript.

I'm running into the same bug. It doesn't matter what I have it return, it is always expecting twice what I return:
Test Results:
Basic tests
✘ Expected: '[2, 4, 6]', instead got: '[10, 20, 30]'
✘ Expected: '[8, 2, 2, 2, 8]', instead got: '[40, 10, 10, 10, 40]'
✘ Expected: '[4, 4, 4, 4, 4, 4]', instead got: '[20, 20, 20, 20, 20, 20]'
Completed in 6ms
Random tests
Testing for 8,6 and 3
✘ It should work for random inputs too - Expected: '[160, 120]', instead got: '[80, 60]'
Completed in 1ms
Testing for 2,5,6 and 4
✘ It should work for random inputs too - Expected: '[40, 100, 120]', instead got: '[20, 50, 60]'
Testing for 8,9,9,3,6 and 5
✘ It should work for random inputs too - Expected: '[160, 180, 180, 60, 120]', instead got: '[80, 90, 90, 30, 60]'
Testing for 9,8,1,1,9,6,1 and 9
✘ It should work for random inputs too - Expected: '[180, 160, 20, 20, 180, 120, 20]', instead got: '[90, 80, 10, 10, 90, 60, 10]'
Testing for 2,7,8,3 and 3
✘ It should work for random inputs too - Expected: '[40, 140, 160, 60]', instead got: '[20, 70, 80, 30]'
Completed in 1ms
Testing for 3,8 and 5
✘ It should work for random inputs too - Expected: '[60, 160]', instead got: '[30, 80]'
Completed in 1ms
Testing for 4,8,5,3,8,8,3,5 and 9
✘ It should work for random inputs too - Expected: '[80, 160, 100, 60, 160, 160, 60, 100]', instead got: '[40, 80, 50, 30, 80, 80, 30, 50]'
Testing for 1,7,2,8,8,1 and 4
✘ It should work for random inputs too - Expected: '[20, 140, 40, 160, 160, 20]', instead got: '[10, 70, 20, 80, 80, 10]'
Completed in 1ms
Testing for 7,2,2,8,7 and 8
✘ It should work for random inputs too - Expected: '[140, 40, 40, 160, 140]', instead got: '[70, 20, 20, 80, 70]'
Completed in 1ms
Testing for 4,8,2,7,3,3 and 8
✘ It should work for random inputs too - Expected: '[80, 160, 40, 140, 60, 60]', instead got: '[40, 80, 20, 70, 30, 30]'
Testing for 4,9,1,7 and 9
✘ It should work for random inputs too - Expected: '[80, 180, 20, 140]', instead got: '[40, 90, 10, 70]'
Testing for 1,7,8,4,4 and 6
✘ It should work for random inputs too - Expected: '[20, 140, 160, 80, 80]', instead got: '[10, 70, 80, 40, 40]'
Testing for 8,2,6,7,9,7,7 and 3
✘ It should work for random inputs too - Expected: '[160, 40, 120, 140, 180, 140, 140]', instead got: '[80, 20, 60, 70, 90, 70, 70]'