these hybrids can be variable, your alberto seems to follow the beastly upright jubaea appearance more than the butia. There is a quite a difference between the BxJ and the JxB from what Ive seen. Yours doesnt have the heavily recurved leaves of the butia mother, its upright, and it has the fattie trunk more like a jubaea. F1 hybrids can vary quite a bit, mules can be more uprright (butia) or weeping(syagrus).
Here is my B x J, not sure what subspecies of butia, I got from jungle music.
Here is my (BxJ)xJ, with more jubaea blood, from patrick shaeffer
Yours looks more like the 2nd one, more jubaea genetic influence. Both are hating the 85-88F weather and grow slowly waiting for winter to green up and speed up. Growth of these palms is probably 2x as fast in winter here with our 55F/75F typical average lows/ highs.