I use server Apache/2.4.10(debian) whith domain mihalikm.sk. Let’s Encrypt Expiry Bot send me regularly meil.
Your certificate (or certificates) for the names listed below will expire in
9 days (on 20 May 17 10:43 +0000). Please make sure to renew
your certificate before then, or visitors to your website will encounter errors.
When I start SSLlabs test my validation is Thu, 20 Jul 2017.
You have already issued a few certificates, some only for mihalikm.sk others only for www.mihalikm.sk and others for both.
CRT ID DOMAIN (CN) VALID FROM VALID TO EXPIRES IN SANs
125051283 mihalikm.sk 2017-Apr-21 11:42 CEST 2017-Jul-20 11:42 CEST 69 days mihalikm.sk
www.mihalikm.sk
124747509 www.mihalikm.sk 2017-Apr-20 23:48 CEST 2017-Jul-19 23:48 CEST 69 days www.mihalikm.sk
94922066 mihalikm.sk 2017-Feb-20 10:28 CET 2017-May-21 11:28 CEST 9 days mihalikm.sk
www.mihalikm.sk
94607995 www.mihalikm.sk 2017-Feb-19 12:51 CET 2017-May-20 13:51 CEST 8 days www.mihalikm.sk
94597800 www.mihalikm.sk 2017-Feb-19 12:24 CET 2017-May-20 13:24 CEST 8 days www.mihalikm.sk
94594012 mihalikm.sk 2017-Feb-19 11:43 CET 2017-May-20 12:43 CEST 8 days mihalikm.sk
92661918 mihalikm.sk 2017-Feb-15 07:38 CET 2017-May-16 08:38 CEST 4 days mihalikm.sk
91457371 mihalikm.sk 2017-Feb-13 09:40 CET 2017-May-14 10:40 CEST 2 days mihalikm.sk
91450249 mihalikm.sk 2017-Feb-13 09:16 CET 2017-May-14 10:16 CEST 2 days mihalikm.sk
So the mails are for other certificates, not the current one you are using, it will expire on 20th July.