That's about "proportional spacing". The editor uses a font where all the characters (letters, numbers, spaces) are the same width, but most folks' display settings use a font where "i" and "l" are much narrower than "m" and "w" (and others are in between), thereby screwing up the alignment. (Using a proportional font also in the editor wouldn't necessarily help, since the width ratios can vary from font to font.)
Editted to add that as pasted into the reply box the chords are spaced over the lines at the correct point to play them. As displayed the chords all get scrunched up on the left so you'll need to work out where to change. Sorry; dunno what that's about.
The way to get around that is to enclose the text you want displayed as monospace (equal width) in "code" tags (that's the icon to the right of the quote balloon icon in the editor's toolbar). It will then display in a box like a quote box, but with a monospace font. Like this:
Chattanooga Choo Choo recorded by Hank Snow written by Mack Gordon & Harry Warren C G7 F C Pardon me boy is this the Chattanooga Choo Choo G7 D7 C Track twenty nine boy you can give me a shine G7 F C I can afford to board the Chattanooga Choo Choo D7 Am D7 C I've got my fare and just a trifle to spare F C7 F You leave the Pennsylvania Station bout a quarter to four C7 F C7 Read a magazine and then you're in Baltimore A# G7 F A# Dinner in the diner nothing could be finer G7 Dm C7 Than to have your ham and eggs in Carolina F C7 F C7 When you hear the whistle blowing eight to the bar F C7 F C7 Then you know that Tennessee is not very far F G7 F D7 Shovel all the coal in gotta keep a rolling C7 F Woo woo Chattanooga there you are C C7 F C There's gonna be a certain party at the station D7 G7 C Satin and lace I used to call funny face C7 F She's gonna cry until I tell her that I'll never roam C Am F G7 C So Chattanooga choo choo won't you choo-choo me home Am F G7 C Chattanooga choo choo won't you choo-choo me home