Originally Posted by
AK lawyer
As far as I can make out, OP has asked two questions concerning two separate situations. Probably it would have been better to ask these in separate threats, so as to minimize confusion.
The link Cdad posted suggests that Honduras is a civil law jurisdiction, similar to Louisiana in the US. Thus it doesn't appear that the order of grantees on the deed makes any difference. But they should seek advice from a Honduran attorney to be sure.
The matter of putting the son on the deed to avoid probate seems to be somewhere in the US. The law of the particular state is important with respect to this issue; we don't know what state it is. In general, JTWROS is only for husbands and wives. Putting the son on the deed may have the effect of making it a tenancy in common, which would not avoid probate. So, again, consult with an attorney in the specific state.