Verses of Protection

Hi,

Bhavatu sabba mangalam
rakkhantu sabba devatā
sabba Buddhānubhāvena
sadā sotthī bhavantu me

In the first line, "bhavatu" seems to be third person singular imperative. In the fourth line, "bhavantu" seems to be third person plural, but ends with "me".

Is the verse correct?

Thanks a lot,
Rahula