Not Valid Issue

Hi

I'm using the verifier tool and I see a few issues I'd like some help resolving.
Question 1: Surely an IP block should be an 'unsure' rather 'invalid' status. or even 'IP Blocked' as status.
Because I normally just remove all invalid emails and many 'valid' ones that just have an IP block on my network are being discarded.'
1) 550 PTR (rDNS) record does not exist for 41.164.155.148 (See RFC1912 2.1) > RSET
Why is this marked as Invalid? Surely it should be unsure because it seems like an IP block?

2) It says 'Not Valid' for
> RCPT TO:<info@ohvec.org>
< 550 https://www.spamhaus.org/query/ip/41.164.155.148
> RSET
Surely again it's an IP blacklist and should be set as 'unsure' not 'invalid'.

3) and there are many more like this. < 550 5.7.1 <kari.colvin@centurylink.com>... Rejected: 41.164.155.148 listed at http://www.spamhaus.org
> RSET

Question 2: Proxies
I've tried using some proxies but then it can't verify correctly even if the proxies are passing. What's the best way to do this so I don't keep getting this IP block on many emails.

Help is appreciated.
Alex