As mentioned in this comment and taken from this blog post by Jeff, here is the algorithm that decide what question appear in the Interesting view which is the default of Stack Overflow homepage:
Here’s how it works. Starting with a list of the last 3,000 active
questions:
drop questions containing any of your ignored tags
drop closed questions if you lack the reputation required to vote for reopening
drop questions scoring -4 or lower
Next, apply the following score formula to the remaining questions:
your interesting tags
+1,500 per interesting tag, up to +2,000 total
your top 40 scoring tags maximum of
+1,000 per tag (scaled), up to +2,000 total
question score
+200 × score, up to +1,000 total
total answer score
-200 × score, up to -1,000 total
number of answers
-200 × answers, up to -1,000 total
number of views
-15 × views, up to -1,000 total
question last activity date -1 ×
(seconds / 15)
Count it all up and take the top 90 by score.
So in your case, I would guess you have favorite tags other than those you chose for your own question thus questions with those tags jumped to the top, leaving your own question behind.