Strange HFSS results with the gain and directivity greater than 2.15 dBi

I was getting some results I did not expect from HFSS. So then I built a simple center fed dipole and once again did not get acceptabel results. Both the gain and directivity came out greater than 2.15 dBi.

I've attached this simple model. Comment and set me straight on something I've missed.

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So that is HFSS. Both directivity or gain and pattern angle width are not correct. In my experience, HFSS can get correct result of S matrix, but correct gain of an antenna can not be expected. It even give you >100% efficiency of antenna.
Anyway, I think the dipole problem can be a criteria for a software.