G0 X0 Y0 Z0
S2000
M3
F10
M49
G1 X1 Y0.1
M48
G1 X0 Y0.2
M49
G1 X1 Y0.3
M48
G1 X0 Y0.4
M5
M2

Resulting commands sent to the realtime code:

# start of program
Nov  4 23:41:22 ke-main-1006 kernel: [636474.803080] 1643309: CMD 674, code  15 COORD

# GO move, line 1
Nov  4 23:41:22 ke-main-1006 kernel: [636474.827066] 1643333: CMD 675, code  28 SET_LINESET_LINE

# M3, line 3
Nov  4 23:41:23 ke-main-1006 kernel: [636475.822144] 1644329: CMD 676, code  51 SPINDLE_ON

# M49, line 5
Nov  4 23:41:23 ke-main-1006 kernel: [636475.823132] 1644330: CMD 677, code  20 FEED SCALE: OFF
Nov  4 23:41:23 ke-main-1006 kernel: [636475.824131] 1644331: CMD 678, code  18 SPINDLE SCALE: OFF

# M48, line 7  !! WHY IS THIS HAPPENING BEFORE THE FIRST G1 MOVE FROM LINE 6????
Nov  4 23:41:23 ke-main-1006 kernel: [636475.825129] 1644332: CMD 679, code  20 FEED SCALE: ON
Nov  4 23:41:23 ke-main-1006 kernel: [636475.826128] 1644333: CMD 680, code  18 SPINDLE SCALE: ON

# first G1 move, line 6
Nov  4 23:41:23 ke-main-1006 kernel: [636475.827138] 1644334: CMD 681, code  28 SET_LINESET_LINE

# M49, line 9    AGAIN, it is happening out of sequence
Nov  4 23:41:23 ke-main-1006 kernel: [636475.828130] 1644335: CMD 682, code  20 FEED SCALE: OFF
Nov  4 23:41:23 ke-main-1006 kernel: [636475.829126] 1644336: CMD 683, code  18 SPINDLE SCALE: OFF

# second G1 move, line 8
Nov  4 23:41:23 ke-main-1006 kernel: [636475.830141] 1644337: CMD 684, code  28 SET_LINESET_LINE

# M48, line 11 - yep, screwed up again
Nov  4 23:41:23 ke-main-1006 kernel: [636475.831124] 1644338: CMD 685, code  20 FEED SCALE: ON
Nov  4 23:41:23 ke-main-1006 kernel: [636475.832123] 1644339: CMD 686, code  18 SPINDLE SCALE: ON

# third G1 move, line 10
Nov  4 23:41:23 ke-main-1006 kernel: [636475.833125] 1644340: CMD 687, code  28 SET_LINESET_LINE

# fourth G1 move, line 12
Nov  4 23:41:23 ke-main-1006 kernel: [636475.834125] 1644341: CMD 688, code  28 SET_LINESET_LINE

# M5, line 13
Nov  4 23:42:19 ke-main-1006 kernel: [636532.050550] 1700609: CMD 689, code  52 SPINDLE_OFF

#M2, line 14
Nov  4 23:42:19 ke-main-1006 kernel: [636532.051531] 1700610: CMD 690, code  52 SPINDLE_OFF
Nov  4 23:42:19 ke-main-1006 kernel: [636532.077515] 1700636: CMD 691, code  15 COORD