testing multi-instance Bold:
[b]1[/b]
[b]2[/b]
[b]3[/b]

Multi-instance italics:
[i]1[/i]
[i]2[/i]
[i]3[/i]

Multi-instance Center:
[center]1[/center]
[center]2[/center]
[center]3[/center]

EDIT:
Test Successful.
Test notes:
Center Code adds a line break.