They came from the factory like that.
The tall one is not a dipstick, it's a fill point for oil for easier access.
The short one is for checking oil level.
The parts lookup for the 147 shows both but they call them both dipsticks.
Ref:# 26 - KH-A-236640 Dipstick - is for adding oil
Ref:# 134 - KH-A-237282 Dipstick - is the actual dipstick for checking oil level.
https://www.cubcadet.com/en_US/conte...4a00ef4f5238/y
There was a decal on the engine heat shield that tried to explain it but unfortunately they did not last.