Tomato question

Hi guys

I have lots of different toms growing in the greenhouse.
I noticed today that the beefsteaks that I have, have their first flower truses but they look weird. There are the normal size flowers and a few of them have a single larger flower on the same trus as the normal ones, about 2-3 times the size of normal flowers.

Is this normal, will the plant produce normal size toms with the odd beefsteak thrown in?

Not really grown these type before, so was not expecting different size flowers on the same truss,  . well its nice to learn something new.
And the toms in the pic look really yummy, just hope that mine turn out like that.