This happens to some variety’s of Tomatoes when after the truss has set the tomato reverts to growing another stem and producing flowers for more fruit.
The most likely reason is that where they originate a lot grow as vines along the ground and this would allow then to spread seed further,I have always removed them as it allows the truss to ripen better and tomatoes further up the plant to be more productive
Each month at Learn How To Garden Dot Com we'll publish a monthly video sharing gardening tips, how-to-dos and what-to-dos. Only subscribers will get access to these exclusive videos - all it will cost is your email address!
Please fill in your name and email address below and hit the submit button. You will get an email telling you when the latest Newsletter is available and notices of any new videos.