is there a problem with this configs

These are my configurations for two diffrent domain that uses same zone. I'm hosting multiple domains on my server.

(* EDIT: I've found a couple of errors and corrected them)

A eng.hzesal.com. 37.148.208.22 0 3600
A hzesal.com. 37.148.208.22 0 3600
A lupuseum.com. 37.148.208.22 0 3600
A mail.hzesal.com. 37.148.208.22 0 3600
A ns1 37.148.208.22 0 3600
A ns1.lupuseum.com. 37.148.208.22 0 3600
A ns2 37.148.208.22 0 3600
A ns2.lupuseum.com. 37.148.208.22 0 3600
A tr.hzesal.com. 37.148.208.22 0 3600
A www.hzesal.com. 37.148.208.22 0 3600
A www.lupuseum.com. 37.148.208.22 0 3600
A www.tr.hzesal.com. 37.148.208.22 0 3600
MX hzesal.com. bf432b850bab4aa78c7e06d2a48458.pamx1.hotmail.com 10 3600
MX lupuseum.com. mail.lupuseum.com. 10 3600
NS hzesal.com. ns1.lupuseum.com 0 3600
NS hzesal.com. ns2.lupuseum.com 0 3600
NS lupuseum.com. ns1.lupuseum.com. 0 3600
NS lupuseum.com. ns2.lupuseum.com. 0 3600
TXT hzesal.com v=msv1 t=bf432b850bab4aa78c7e06d2a48458 0 3600
TXT hzesal.com v=spf1 include:hotmail.com ~all 0 3600
(TXTs are for hotmail)

I have two questions:

1. Can you see any problems about them?
2. I'm using only one zone for my domains. Is this the right approche for hosting multiple domains on my server?