weird MX behavior

[Josh Hyles]

Here is my record....

$TTL 86400	; 1 day
@                       IN  SOA ns1.goatinatree.com.  root.cvlsoft.net. (
                        	2006100605   ; serial number
                        	3600         ; refresh
                        	7200         ; retry
                        	604800       ; expire
                        	86400      ) ; default TTL

;
;  Zone NS records
;

@                       NS	ns1.goatinatree.com.
@                       NS	ns2.goatinatree.com.

;
;  Zone records
;

@			TXT	"v=spf1 a mx ip4:12.45.64.8 ~all"
@                       A	63.247.73.122
ftp                     A	63.247.73.122
www                     A	63.247.73.122
sqlsrv			A	216.180.229.66
websrv			A	216.180.229.67
$TTL 900	; 15 minutes
@                       MX	5	mail.cvlsoft.net.
mail                    A	12.45.64.7

#####################################################


I am writing today because I'm trying to see if there is anything
wrong with putting the MX record at the bottom like I did in order to
only have 1 section for 15 minute TTL.

Any help would be much appreciated

Josh