El T
I really think Fat Fingers are at fault since "u" and "i" are next to each other on the keyboard, That is too easy and boring, so more fun to come up with other reasons.
My birth certificate has my first name as "Steve".
Everybody wants to know/ call me/ or change it to Stephen, Steven, or , even Stefan, Stefen. They cannot or do not want to accept my parents did not want all that confusion and hassle for me...just plain jane "Steve".
My middle name is worse, and all my life , even this current semester at College, " Not only do you pronounce your last name wrong - you misspell it too."
I have always intialed things "SM". Yes folks actually think the Purchase Order, the Repair Order, or note is now "Sevice Marked".
Folks in a hurry going nowhere, not paying attention, or just don't know or care. "Get something in a database, get it on a label and mail it out".
Something I have always used/done , to determine whom gave my name to what mailing list:
Say for instance my address is 1234 Some St. I give out 1234 Some St, Apt A, or Suite B. This is a house, not a apt bld, or business bld. I get the junk mail and aha...so and so is whom I gave 'that' apt/suite number to, and these junk mailings have that apt/suite number on them too.
Then I see whom sent stuff to Apt 10 and suite 540....caught another one.
Mother was concerned about some weird junk mail, I looked at the labels, seems when she attended a required business meeting about benefits and retirement matters - and had to give addy and all...well darling eldest son attended this with her [yours truly].
Mom does not live in Apt 15, she has a house - nor is there a "s" at the end of our last name. When TPTB denied they gave out, exchanged mailing lists, that darling eldest son showed the TPTB how he knew.
Mom does not get anymore junk mailings from those folks.
"Honey, that was brilliant, you are such a smart son, I didn't know you did that"
"Aw shucks Ma, twern't nuttin'"
"Oh wonderful son?"
"Yeah Ma?"
"How come I didn't get a bunch of bothersome phone calls? Did you give these numbers to the Attorney General for no call list?"
"Nah...I figured these folks having the benfits meeting, being from out of state and all, might want to know what the time and weather was down here from time to time, so I put down your home number as being the Time & Temp from a local TV station". 
The important information she needs from the proper folks are sent to her house.
These "other" folks, well my gut said "if it sounds to good it probably is", it was a required meeting and all. Mom and I got free eats and drinks so it was not a total waste of time. I got extra post-it notes, pens, pencils, and got a cheap calculater for mom's checkbook out of the deal.
See? I can be useful at times afterall. 
