tl;dr This stopped around the time the Q was asked.
There are presently four instances of
busses on the main site at present, spread across three answers (which I am reluctant to edit).
Grammarist has this:
In 21st-century English, buses is the preferred plural of the noun bus. Busses appears occasionally, and dictionaries list it as a secondary spelling, but it’s been out of favor for over a century. This is true in all main varieties of English.
After bus emerged in the 19th century as an abbreviation of omnibus, buses and busses (the logical plural of buss, an early alternative spelling of bus) vied for dominance for several decades. By the early 20th century, though, buses was the clear winner, and it has steadily become more prevalent. Today, buses appears on the web about 15 times for every instance of busses.
TSE has a specific tag for Travel by city buses as well as long-distance buses, which also known as coaches. which, as usual, is pluralised as buses.
Consistency aids searching and reduces the possibilities for confusion, in particular for those whose first language is not English.
In addition to a slang meaning of
to buss (for talking about) there is a valid, if somewhat archaic, meaning still current in dialect for
to kiss, that is recognised by Google Translate.
Of the three examples given in this Q, two involved changes other than just
buses. I suspect all the other edits also involved more than just removing a redundant
How does one determine the “consensus view”? relates to discuss such actions on meta and the following to giant editing bender:
Is it okay to 'flood' the front page?
Excessive editing of old posts