You're clearly not singing it correctly! Let me assist with the phrasing. The accent needs to be on the following words in the third line:
"And when he hit the ball in-to the net"
Maybe it needs a poll.
"Why Did he Let it Bounce" to the tune of "Once I Caught a Fish Alive"
One, two, three, four; five
The Palace keeper takes a dive
Six, seven, eight, nine, ten
Then he gives the ball straight back again
Why did he let it bounce
To give Maupay a chance to pounce
And when he hit the ball into...